Firefox is also really good on Android these days. I use that with all the usual ad blocking and privacy extensions I have on desktop.

ALVR works great, assuming SteamVR in general works with your DE (no Gnome support atm but KDE works for sure).

That display out will be hard to match with an old optiplex or laptop, but I agree, the pricing is getting less absurdly low and more just moderately low.

Do we have any reason to believe that it isn’t? Generally I don’t know if Apple has lied about what data is local before.