I definitely prefer it over Snaps or appimages. Straight-forward to update, and Flatseal provides a nice GUI to control permissions (if needed). Themes may not work properly, but whatever, not a big deal for me.
The distro's repo is always my go-to. If it's not available there, then flatpak, and I'll use appimage under duress. If that doesn't work, I'll figure out a different solution.
You're rolling the dice either way. I can see the relatability being potentially higher with another autist, but there's also the possibility that your stim is their meltdown trigger (or the other way around). Honestly, it's just a matter of finding someone that complements you & appreciates your quirks, regardless of whether they're NT or ND.