The big difference here is that nobody should expect this app to continue working without updates. Contrast this with something like sublime text: years from n

The big difference here is that nobody should expect this app to continue working without updates. Contrast this with something like sublime text: years from now you can still expect it to work normally. What I expect is that if your app will not continue working for a long time then you should not make "lifetime license" one of your selling points unless you are prepared to offer lifetime upgrades too.