Hate to burst anyone's OBJ bubble, but they aren't dead (and probably won't be anytime soon).
Are they missing tons of features that exist in other formats? Yes, but they're plain text... which makes them incredibly readable, editable, and portable. Everything can open an OBJ.
I've been getting quite a lot of volumetric video assets from Microsoft Mixed Reality Capture Studios over the last 6 months and it's all OBJ/PNG sequences (and no MTL files). I've ended up using python to generate, rename, relink, import, export tens of thousands of individual frames and images. I couldn't have pulled it off without it.
I know there are some artists that recoil at the thought, but python has been what's saved me from just about everything missing from Maxon's toolset. Way easier and more powerful than switching programs entirely.