This is a lie perpetuated by the saas industry. If you compare saas companies shutting down “services” to prior product companies stopping updating versions you don’t see much difference.
Also, sw engineers used to care about designing something well. So when you used something the first time it was occasionally delightful. Now it’s just “launch and we’ll worry about that in our next sprint”.
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.
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.)