Broadly speaking, I believe this has become a self-fulfilling prophecy, especially for user-facing apps. Yes, some requirements change because they genuinely have to—but many change because there's a business incentive to make use of all those programmers on your payroll.

In this case, I'm perfectly confident that Scapple will be updated to e.g. stay compatible with macOS. But, they aren't going to turn it into something it's not. Scapple knows what it's for and it does it well.