adrien:
yes that’s all correct. My point was that if you run a 4k monitor with 200% screen scaling, the OS is still dealing with all the pixels, and apps that don’t handle HiDPI properly will display improperly, such as VSTs.
If you run it at 2k resolution instead, your OS only has to deal with 1/4 the number of pixels (which saves a lot of work / CPU / Memory etc) and apps that can’t handle HiDPI properly aren’t affected since you’re not running screen scaling (it’s still set to 100%).
So there’s more of a difference than just slightly (hardly perceptible) smoother text etc.
I think their point was, the proper term for 1080p is Full HD/FHD, not “2k”.
That’s what got everyone’s feathers ruffled. (me? I enjoy a good feather ruffling.)