Comment by callc

I came here to say something similar. Ever since I found out about alt + left click drag anywhere in window to move, and alt + right click drag practically anywhere on any side to resize, anything else feels user-hostile.

I rarely use windows anymore, but just like you installed a tool to get this behavior.

This UI feature saves approx 3 seconds on average for resizing windows. Plus, more importantly it more predictably works, and is an easier target to hit than a 2-10 wide pixel line or square region.