Nowadays, everything should work well out of the box (at least on Fedora/Gnome). Most, if not all of my customization/setup is with SwayWM and other pieces regarding that, so that script would be quite niche. I think most if not all of the concerns (on the Linux software side, at least for me) are graveyard issues that have now been resolved. Regressions do happen, but that’s more-so regarding Linux kernel development.
As for power management, power-profiles-daemon that comes stock with Ubuntu/Fedora does a pretty good job out of the box with it’s three profiles: powersaver, balanced, and performance. However, for more fine tuning, I’ve currently settled on TLP. The Linux battery life tuning thread has a lot of good info, and here’s my latest write-up.
I hope your Framework experience goes smoothly!