Just today, I quickly created a slideshow by writing markdown using Marp and loved the experience. I'm guessing this will become my new workflow for making slides.
If you want your slides to be minimal and clean and you don't have a lot of time to do, then Markdown works. To me, over time I am convinced that having the ability to do animations to explain technical ideas is great. While it's not impossible to do fly in/out/moving animations in LaTEX, presentation software makes it ten times easier to maintain.
I think that not everything is best explained in code. Sometimes you need pictures/animations to convey the ideas.
Do you have an example slide? Just trying to understand what you mean.
https://giphy.com/gifs/4GXOwrfX1p9SuzbGzS/fullscreen
Sorry, the slide is clipped for some reason, but that's because I don't know how to configure OBS. It's not the best illustration ever, but you probably get the idea.
Here is an animation that isn't mine and I think it's really well done to explain a hard idea (not necessarily in PPT):
(also, the 8-bit guy is great!)