I opened a Mockups project where I knew that the mockup was laid out how I wanted it, for another project.
Then, like an idiot, I didn’t copy that to a new project, but forgot to do that and instead started editing it directly in the project I had originally opened.
Before long I had made a lot of changes to the mockup. Once I realised my mistake, I figured I’d use Undo to revert them all, once I had copied out the changes to another project. But it seems that Mockups’ undo stops after a certain number of changes.
For this situation, unlimited undo would be very helpful. Since mockups saves automatically as you work, there’s now no way for me to revert the file to how it was before I started making changes!