A lot of us out there don't make Open Source for rewards. We just like sharing things. I have about 10 users for one of my projects. If I had 10,000 it would be the same. I'm just glad anybody found it useful. And I like using other projects because at the end of the day I don't want to sit here writing code (even AI code), I just want a solution to my problem.
Maybe there will be fewer Open Source contributors. But maybe there will be even more of them with AI making the labor and maintenance easier. Either way I will still be publishing my dinky project, because it works for me, so maybe it'll work for someone else.