This isn't even Nostr's final form.
My personal prediction is that the Other Stuff will take precedence over the Notes. The implications of a decentralized relay system that is basically a sovereign Internet-of-Things are much, M U C H more far-reaching than microblogging, especially when E2E encryption matures here.
There's room for other social platforms since they each have their own strengths. As much as I look askance at its current user base, I actually think that BlueSky has a chance to outlast Xitter. Overall I think Nostriches should be more aware of its current shortcomings like key management and poor search/filtering tools