Unless you're writing through a time warp from 2004, this is not true at all, IME.
But the statement is vague. "Work well" can mean some esoteric DPI scaling stuff that I think is only noticeable with 4K combinations. What distribution? What's "their display driver"? Nouveau, the open-source Nvidia one, is pretty bad, and everyone uses the proprietary Nvidia driver (this may be hard to come by on some distros, like Debian, but don't use those; use Ubuntu or Manjaro). The AMD open-source one is great and everyone on AMD GPUs uses that. I've been running triple monitor, diagonally-aligned 1080p/1440p configurations for years on several distros and DEs with both Nvidia and AMD drivers.