I find it annoying to worry about multiple partition sizes. Having to make sure your root and home partition are sized correctly is one more thing to think about.

Not super into keyboards, but maybe something like this? https://www.keychron.com/collections/custom-keyboards/products/keychron-q12-qmk-custom-mechanical-keyboard#

Seems like an odd direction when a lot services are moving online and to SaaS based solutions, removing the dependency of a specific underlying OS.

Yes.

I think Jisti does all of those things. Essentially a self hostable zoom. Audio, video, screensharing and text chats.