Beamer popular with people that need to add lots of equations. It's easier/quicker if you know your greek alphabet and have several equations.
Beamer is the slide equivalent of latex. Even among latex users, PowerPoint seems more popular. If you've written the paper and are going to present it, you can just take the equations from the paper as screenshots so the big advantage of beamer is nulled.
I think reveals target market seems to be web developers. It's html slides so might be easier if you want that workflow.
I actually do use beamer for most presentations, but all universities I've worked at only ever provided templates for PowerPoint. My solution to this has been to just write a .sty file that makes it look similar (and leaves out the over-designed garbage that the templates tend to contain).
Edit: I've tried reveal, too. Didn't hate it, but it makes some things ridiculously difficult (e.g., handouts or "overlay-style" animations).
We have some pretty good styles at our company and we also had some at my university. It's not beamer that looks bad, it's just the default styles that suck. Use the metropolis styles, they're decent.