The Nostr clients that are building now have the first-mover advantage. It's going to be hard to catch them up in the future as long as they keep innovating
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More like they are forming now some kind of standard of UI/UX for the protocol.
If people will get used to it, it will be hard for others to come to push some innovation/change of well known mechanics.
New entrants will have to come up with something different that the incumbents can’t build themselves.
Like Facebook who h basically stole all its features from new social platforms. They even copied the timeline from Twitter.
Big time advantage. Corners will be cut to catch up. Beware.