I hate trying to shove everything I buy at IKEA into my small car. All those flat packs just don’t fit in a small hatch back. If IKEA was closer, i could make several trips, but no, jam the car full, strap things to the roof, and figure the next time, I may have a different car.

Otherwise, flat packs have their uses, I couldn’t fit three billi shelves in my car otherwise.

Nice try Mark, still not gonna use Snap

They don’t automatically theme along with the system.

IKEA is usually very good, but there is a lot of cheaper stuff at other stores where holes aren’t lined up correctly or the fasteners are cheap and easy to damage. I have had some build issues with IKEA too, usually really inexpensive stuff like a dining room chair, but it is uncommon.

Filesystem permissions

For many apps it is not an issue and provides additional security but in other cases it’s very annoying and not trivial to fix.

Example1: opening a .docx from Thunderbird flatpak with OnlyOffice flatpak does not work out of the box.

Example2: mpv and VLC flatpaks work well for local files, but fail to open network shares from Dolphin.

I think a possible solution would be runtime permission dialogs when denied access.

They take up too much space. Considering that you need to install flatpak versions of stuff that you already have on your system, this makes 200MB applications take up like 800MB or smth.

Running them from the command line isn’t easy, so it’s not really used for command line tools. This is the one and only upside to snaps.

• needless sandobxing (by default flatpaks can access your filesystem but not mounted folders, how is that secure and not jist inconvenient?)
• yet another application manager not even well integrated into operating systems (linux mint doesn’t update flatpaks by default)
• applications are usually not updated very often, not sure if that’s a systemic problem or just laziness
• application X that is 50MB stabdalone requires 2GB to install and takes 3GB of space because it requires the entirety of gnome libraries. Application Y also requires 3GB because they use KDE or another version of gnome

I only use apt, or compile from source but here is what some guy online wrote:

* Creates larger packages from compiling in most/all of the libraries used in development that use up more storage space because you are storing additional copies of libraries already on your system.

* Slower loading because you are loading a separate copy of libraries that may already be loaded and available for use.

* Updates to external libraries that add features, fix bugs, or change functionality are not available to the existing flatpak, which also reduces the testing use base for updates to support libraries.

* Breaks the fundamental concept of *NIX which is to separate out development of different subsystems, meaning that if an external system (library) changes how it does things, your program may no longer work or have features suddenly limited because it is using an older version of the library.

* Depends on the Application Binary Interface (ABI) remaining stable in the Linux kernel, which is preferred but not guaranteed. If an ABI is changed, the flatpak can stop working.

* Can be difficult to adapt to different distributions of Linux. Many Linux distributions have package maintainers that compile programs from source to ensure it works on and is compatible with the particular distribution they are supporting, and flatpaks can struggle to work on a different distribution.

* Sometimes avoids the work necessary to make the source generally compile-able across distributions. It's easier to compile a flatpak on the system it was developed on because all of the testing was done on one particular distribution. However, different distributions may have differences like the files in different locations, different software or libraries installed, different versions, different compilers, and without the program being compiled from source with all these differences, the codebase may never be updated to be take into account the differences in systems. The source code can be very stale, in a sense.

* Not a long-term solution. Flatpaks generally age out over time because they can't keep pace with distribution changes over time, as the open source environment is still very dynamic. Only source code that is legal to share is really sustainable over the long-term.

* Reduce use testing and reporting of bugs. Reported bugs usually get ironed out over time, as most program and package maintainers take pride in their work. With flatpaks, users don't get to test the program against updates to support libraries, so there are less user reports of bugs, and it can mean that bugs don't get identified as quickly or ever.

* Harder to identify bugs. Because flatpaks are monilithic binaries comprising both original and external work, it can be hard to figure out if a given bug is in the original program or supporting library, leading to mis-reporting of bugs, which adds effort to figure out the real source of the bug.

One issue that isn’t mentioned is that it removes distro-specific considerations and modifications from the process. A major point of Linux is to have a repo specific to your distro and that repo represents the needs and desires of the people who use that distro. Flatpak removes all of that and it’s a shame.

Can’t get them to run on Windows.

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