Despite what people say, you are not missing much in CU unless you really really want to draw memes in Paint 3D.
Depends on what you need/want. CU was important for me.
It brought 16.04 to WSL (windows subsystem for linux).
Location bar in Regedit which i use a lot
SymLinks are a little easier
Hyper-V connection window is resizeable (thank goodness).
A Screenshot Hotkey (like OSX) - Windows+Shift+S
Somewhat useful storage sense (instead of CCleaner)
While i agree the feature aren't ground breaking and probably won't matter for most people there were definitely some nice things in there.