No offense, but this doesn't seem like a realistic way to look at things.

Autodesk (since you mentioned CAD) itself dates back to 1980s. And even then, they had at least 15 people working on AutoCAD. That's a small team size. Today, they have over 14000 employees. Some random website tells me they had ~5000 of them 20 years ago. You can make anything work when you throw an army of people at it. It's not exactly a good point towards small teams being able to build complex imperative/OOP apps.

That's not to say that Apple is not dropping the ball here. I don't really have any Apple devices to check for myself, but I know that Microsoft, for instance, has been doing much more than just dropping the ball when it comes to UI. But, I'm not sure that has anything to do with imperative vs declarative.