I am wondering if there is a new version of Adobe Captivate coming soon? I believe 2019 came out in December of 2018? I would love features like Layers for popup info and pausing page audio when on a new layer like Articulate Storyline offers. Also better Accessibility features like Storyline has. For example easily turning off screen readers access to certain items, built-in Quiz features that are accessible, and the use of Triggers.
The last time there was an update they put out a call for prerelease testers over on https://elearning.adobe.com. No guarantee they will do the same but keep watching here and over there and you might find out something.