HiDPI is pretty good though, I'm running Fedora Workstation (GNOME) on a 4K 14" Thinkpad X1 Yoga with 2.5x scaling. Everything looks crisp except for a few applications like Audacity and Minecraft.
My school laptop is at 125% (it's high resolution enough that I have a hard time reading the text on 100% ) and my other laptop is 100% . 150% is just wasted screen space.
At 150% it's the "same" resolution as the desktop display, which is great for window management, % of wasted space completely depends on how many pixels you had to start with...