Yeah the comments about Steam being a monopoly are weird to me. Steam has a huge market share, but they don't own the whole market and they don't try to prevent you from buying your games elsewhere. Proton even works on non-steam games. I've used it to play WoW private servers on Linux.
If Valve isn't a pro-consumer company, then I don't know what company could possibly fit the criteria. They're not perfect, but they've earned the trust they have. I'll trust Valve until they give me a reason not to.
I use Samsung Dex and I was disappointed by how limited the android version of Google Sheets was. Like it's cool that I can edit stuff on my tablet, but it locks you out of a lot of functionality. This desktop mode could be really cool but it needs to be supported by apps.