1. I dunno about a panacea, but it's pretty great for old hardware. My 2011 desktop still runs Alpine Linux just fine.
2. By all means start with macOS, but eventually Apple will stop supporting your machine. And y'know what will still work and get updates then? Linux.
> but it's pretty great for old hardware
Which old hardware? You're circling around to the grandparent's point again; Linux support is hardware dependent.
> And y'know what will still work and get updates then?
No, I don't. Depreciated iPads lay dead in piles, and they don't run Linux for shit. You want me to believe the M4 will graduate to the big leagues?