I've printed ABS just last week, yeah it required 'enclosure', and wall insulation panels and tape worked without any problem. It's just abs and other materials are extremely hard to 3d print well in general and unheated enclosure gives you little more then my solution made in 15 minutes, while making printer itself harder to maintain. They aren't in any way must have in 2025, same with corexy (it's just another scheme among half a dozen of others), enclosed corexy printer doesn't make your print quality better automatically.

Most people print nothing but PLA anyway.

Thank you for recommendation, I'll look at them.