I also have repeatedly experienced the phenomenon of nontechnical people having built custom software to run their businesses. A lawyer friend was first, sending me a link to his GitHub(!), where he has built a custom client intake/practice-management application to work as the firm works. He's not the only non-technical lawyer I know who has shared vibe coded apps with me.
I personally build many, many single-use apps than I ever would have before. Gnarly debugging sessions can be greatly simplified by inserting a custom piece of disposable tooling/etc. I am not a Mac programmer, but I now have custom Mac apps to solve problems that only I want solved. Do these count?
Honestly, I would be a little surprised if anyone posting on HN did not have some personal exposure to the explosion of apps.