I love the Genesys system because it's designed specifically to homebrew any genre of setting you want (including custom magic systems), along with multiple official settings.
It is so easy to take NPCs, items, etc, from fantasy to sci-fi to current day, to post apocalyptic, etc. Since the rules and stats are intentionally setting agnostic.
And I absolutely love the narrative dice system.
If OP likes plating a variety of settings it's worth checking out. Or one of the billion other games out there
Debian on a base model 2013 MacBook air checking in. Runs better than it ever did on Mac OS. Battery life is still fine. I did have to use proprietary drivers for some things (wifi and webcam) but other than that it was pretty much plug and play.
Lots of replacement parts are on ebay for cheap, and there are a lot of repair tutorials on YouTube (and piped.video) I replaced keyboard and trackpad cheaply, and some of the internal cables.
As far as drawbacks, if you have to replace the storage or or logic board, those are expensive. I have a sound issue which I haven't been able to fix and from searching around it looks like a logic board would be required. Bluetooth headphones work fine though so I'm just dealing with it.