When you buy a physical product, do you expect the company to stand behind the quality of their product by providing (limited) warranty and/or support, despite the fact that this won't bring the company any new income?
Nobody forbids you from selling your software with an asterisk that says "works on X.Y version of MacOS, future releases will require a new license".
And if no one new is buying your product, I think you need to ask yourself whether you have a sustainable business or a hobby.
Comments
It's the cost of running a business.
If no one new is buying your product and you are just supporting one time pay users, why would a developer be incentivized to keep doing updates?
When you buy a physical product, do you expect the company to stand behind the quality of their product by providing (limited) warranty and/or support, despite the fact that this won't bring the company any new income?
Nobody forbids you from selling your software with an asterisk that says "works on X.Y version of MacOS, future releases will require a new license".
And if no one new is buying your product, I think you need to ask yourself whether you have a sustainable business or a hobby.