If there's anyone who may take issue with your assertion that the software will continue to get updates and new features and bug fixes, I think it would coincidentally be Logic MacOS users. FCPX still gets some good attention, but Logic; the good things you could say about it are that it still works how it has, and you don't have to pay a subscription fee.

If a subscription fee is what it takes to get some attention then so be it; $5/mo is certainly reasonable. But I wouldn't assert it as a foregone conclusion.