I'm not saying the product can or cannot be good on first release...
But the world is ever changing. Let say you build a UI for database. In a few years, a new version of mysql or postgresql will be released, and you have to update your software as well to use the new features.
What I'm saying is that almost whatever you are building, the development will never be done.
It's not relevant, because then the developer can release a new major version and require a new payment. The user will know exactly what changes this new major version has, and can decide whether he wants to pay for it or not.
With subscriptions however, this all becomes hidden/vague. You're always paying, but it's no longer transparent what exactly it is you're paying for. Which is obviously very bad for the user.
(Of course it's a an entirely different story for services like Netflix, AppleTv+, Spotify, etc.)
But the world is ever changing. Let say you build a UI for database. In a few years, a new version of mysql or postgresql will be released, and you have to update your software as well to use the new features.
What I'm saying is that almost whatever you are building, the development will never be done.