It will really hard or impossible to reach the level of development that ms and google have in their cloud collaborative products. They don’t have the resources like the mentioned two monsters.
A single coder made photopea which is near feature parity of photoshop. I think the Proton team can figure out a docs suite
It may require intense passion and a manic episode to do something like that with one coder or a small team, which is hard to arrange bureaucratically.
I don’t think that’s true at all.
I haven’t used only office but it looks pretty great.
Open source alternatives are always around, even if they’re a few steps behind corporate offerings.