experimenting with my 2014 macbook pro and several linux distros (xubuntu, mint, fedora)

So far I have 8 partitions:

• 1 EFI for grub,
• 1 hfs+ (Linux HFS+ ESP) for OCLP, I think,
• 1 apfs for the macOS 14 I cannot boot,
• 2 ext4 for xubuntu and mint
• 1 brfs for fedora (so it cannot be ext4?)
• 2 unallocated ones, because I deleted systems I don’t want.

I use gparted: the 2 unallocated sections are separated. Is this a problem?

How many partitions are too many for this machine? 247 GiB storage and 7.66 GiB memory.

After I’m done experimenting and keep the 2 to 3 operative systems I like, should I wipe the notebook, create the 2 to 3 partitions I’m going to need and reinstall? Or would it be better to simply delete the partitions I don’t want?