I don't care to weigh in on any questions about how it's built. I also didn't experience any stability problems, but this was admittedly a while ago now, and the product may have subsequently taken a turn for the worse.

As far as the user experience goes, though, I would say that Adobe Connect makes it possible to create an online classroom in a way that just isn't possible in Zoom.

Which is in no way contradictory to the idea that Zoom is stable and intuitive for adult learning. "Adult learning" is a wide net that covers a lot of learning situations that do not necessarily involve or benefit from a classroom environment. YouTube and printed books are also stable and intuitive for adult learning.

But, for educators who are scrambling to adapt their pre-existing curricula to distance learning, I would argue that preserving as many elements as possible from the working environment that they're used to is pretty key to giving them the best chance possible at a successful transition.