It's important in this discussion to distinguish between people who make a living from what they create and those who don't. Of course, people can create amazing things with AI in short time but I took "solo founder" to be the solo founder of a company that earns money or manages to obtain good funding.

Also bouncing thoughts off each other. People can achieve more together by communicating about it, than each working completely separately.

You're absolutely right. I'm by some somewhat complicated fate not worth explaining here practically forced to attempt to make a living by selling software, and it's indeed lonely. I'm sitting on the computer at home developing every day and have to force myself to go for a coffee outside. :(

Early != right. No one gets a co-founder because they want some simple (Claude-doable) work done by them!

You get a co-worker for the expertise, knowledge, and skills that they have that you don't. An AI that has a small/simple subset of that can't replace a co-founder.

Will there be more solo founders now? Of course, there were solo founders before, and the barrier to solo is now lower. But that doesn't change the fundamental fact that it's still (even with AI) relatively rare for a single human to know everything (and how to do everything) that a successful start-up requires.