I feel like Sublime Text showed the best of it. You purchase the new license every new major version. Affinity apps are the same. Acorn. Alfred. And a lot more. There are certainly some apps that release a major update every year. But in that case you pay for work already done. In case if you pay for subscription, you are going to see minor updates “bug fixes”.

I don’t see a reason for an indie developer to charge subscription, if there is no server cost. New versions should just make the app interesting for more users, so the income should be flowing constantly every month.

Anyway, I just personally don’t support subscription based apps and never will.