Yes it's a subgenre, and yes it's a thing and has been for a couple of decades. And it even has its own subgenres/'mixins' like acidcore or goa with acid influences (not sure that one has a name).

Check e.g. https://everynoise.com/engenremap.html

I can confirm acid techno is alive and well in Berlin. Lots of good music coming out and DJs playing it.

That tiled room gets me through the workday. In that ilk: Fear n Loathing. Art of Minimal. Trippy Cat Music. Beamer. A bit further from that sound but still great for coding: Cercle, Radio Intense, Cafe de Anatolia.

My favorite acid mixes have been Dr. Rubenstein's Quarantine series: https://www.youtube.com/watch?v=0XYcwN4wXhI

For being an (insular) world traveller, you offer scant information.

Acid is probably the most trending subgenre of techno these days, just cuz you've never heard of it...

You don't know what you're talking about, here's a foundational acid track that's probably older than you... https://m.youtube.com/watch?v=PbGTj9Yb_x4

Nothing that the parent comment said implied that acid is a new genre. They were saying it's very popular now, which is true.

YOU are the ignorant one if you don't know that acid is very much alive and kicking today.