> When a profitable startup sells out, that's the founders also saying "profitable isn't enough for me".

Or just "I'm done with this shit". It's remarkably difficult to run a small (software) business in the US. Section 174, multi-state income tax filings. It's a bloody pain if your goal is not just to operate the business and be overhead, but to actually do stuff. Regulatory/tax complexity thresholds depending on business size would be a welcome improvement.