There's nothing bad in using non-OSS software, though. While I prefer using OSS to proprietary software, I wouldn't sacrifice basic features or security if there's a better proprietary alternative.

Only using one of those, Snap, and that only for running a later version of LibreOffice for the occasions where I want to use a feature not on the unaccountably old version in the (Mint/Ubuntu) repository.

90%apps are opensource in my device.. Rest 10%non-foss apps. Because not available in foss or u can say the foss version not better thn those 10%non-foss apps 😁

Interesting! But why is #VSCodium not mentioned as an open alternative to VSCode? Honest question, I might be missing something. vscodium.com/

I'm old. - I did nit even consider using any if them.

Okay, I admit it... I sometimes play “Team Fortress 2” on the Steam platform, which is not open source. 😁

Im not entirely sure, but I think saying tailscale is closed source is cheating. AFAIK all the clients are open source. The only closed source part is that server, which is irrelevant because we would have no way of checking they are running the same version that they publish