I see this happening in the world of operating systems. Yes, Windows and MacOS exist and aren't going away anytime soon, but Linux has ensconced itself into the world now and it isn't going away either. I wouldn't be surprised if Linux never truly dies and exists for as long as there are computers.
I mean, why not? It exists, it works, it's free, and many people know how to use it and modify it to their needs. It might not ever take over the world, but it will persist.