Yeah. Part of why this is possible is simply that there are tons of subscription apps out there that were never really justified in requiring a recurring payment and are actually fairly trivial.
It used to be that you offer subscriptions only if there are ongoing costs, and a one-time payment if not (utilities, local, etc). SaaS kinda ruined that.
I'd welcome a boom in DIY vibe-coded utilities for personal use.
What I fear is a pollution of the open source space with tons of tailored apps that have a lot of overlap, but none of them get meaningful contributions because the maintainer will most likely respond with wontfix to almost everything (if they respond at all).