> Instead, what I think has drastically changed over the past 40 years or so is the ability of a solopreneur to make real money.

Part of that was accurately diagnosed by the article in the bit about the dog walking business vs dog walking platform.

My partner bootstrapped a successful full-time cleaning business that she ran for a few years and the limiting factor was basically her ability to hire and retain good employees. A physical cleaning business has no path to scale like a tech company though.