I think it will last… Until big companies doesn’t use it anymore.

Edit:

I forgot to explain why.

Many big companies uses Twitter to announce things, like new products, updates, etc.

I think when they all stop announcing on Twitter, or even change to another platform to continue their announcement (for example, some of I used to follow have been moved Mastodon), these users will think that there’re no reason to use Twitter anymore, then Twitter would less known, and less users use it afterwards.