Yep, I've heard a lot about it. Usual advice is to make a thorough research on all your hardware and it playing well with Linux and sleep modes -- which I wouldn't mind if I fully invest myself in a beastly Linux workstation by the way.

However, with the advent of the really good AMD CPUs lately, and their attached motherboards and recommended RAM sticks, I am not really sure a proper research on what plays well with Linux and sleeping will be viable for a while. The community has to catch up with the new hardware first and whoever buys a Threadripper 3990x for Linux (together with its recommended high-end motherboard) is basically taking one for the team until proper drivers (or upstream Linux kernel support) is added and stabilised for the sleep modes of the newer AMD hardware.

So even if I had $25k laying around I'd still not spend them on a TR 3990x Linux workstation right now. I'll wait and see how the Linux community deals with potential issues with the motherboard chipsets first.