Recent testing revealed that Arch Linux, Pop!_OS, and even Nobara Linux, which is maintained by a single developer, all outstripped Windows for the performance crown on Windows-native games. The testing was run at the high-end of quality settings, and Valve's Proton was used to run Windows games on Linux.
Secure Boot is just Bootloader Signature Enforcement controlled by M$, it’s not gonna prevent Superfish 2.0 from happening.
Unfortunately, I don’t have a coreboot-able system. When I move out I’ll make that a priority.