I’m a big fan of this concept. I’m always coming up with ideas, or more importantly problems I think tech could solve (or solve better). Some of them I might work on myself but most of them I know I’ll never touch them for a multitude reasons like lacking the technical expertise or not knowing the right people to talk to. I’d happily put these online for someone else to solve. In the end it would still be solving my initial problem.

As far as I can tell, nothing like this really exists. A quick search gives r/startup_ideas and a few other low traffic forums.

I think structuring it around the fundamental problem, rather than the solution would provide a nice space for lots of solutions to flourish.

Users could easily like problems that they also have, giving a nice ranking of the ‘most important’ problems, and which would provide a ready list of people to present an MVP to, get feedback from, and you may even find a cofounder amongst them.