Pay-once software users demanding constant updates is the equivalent of buying a book and getting mad the author won’t keep adding chapters.
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Does it not occur that "constant updates" are part of the problem. Not every innovation is an improvement.
@Daojoan I think you've got this all wrong. When I buy an app, I'm expecting bugs to be fixed and them to respond to "I have a problem doing X. What am I doing wrong." That's me asking the landlord to fix the water heater or replace the dripping kitchen faucet.
I don't expect a new user interface or "the app will now work with Y". That's why I pay for upgrades. I do expect to get some sort of discount for buying an upgrade. I hate companies that make me buy the app all over again just so it runs on the next release of the operating system.
Developers that do minimal support or ghost me get zero stars. If I use the app enough, I might even fork it on git and make my own version.
Or I stop using it entirely and find something else, like TickTick or 2Do. YMMV