A famous anecdote along these lines are the whatsapp founders.

I haven’t done so personally yet but it’s starting to look like I might consider this route.

Several years ago, I would have leaned toward a SaaS business targeting some super niche vertical, not to make 1000x VC style rocket-ship returns of course, but as a way to bootstrap into a nice business. I get the sense most verticals with a TAM worth going after are now very competitive.

Interested to see if people see opportunities in non-tech routes.