Is Usyk technically undisputed?

What you’re saying makes sense but the word “undisputed” in boxing has a very specific definition…it just means that a fighter holds all the major belts in a particular weight class, which in the current era means the WBC, WBA, WBO, and IBF. Even though most people may agree that Usyk is indisputably the real champion at heavyweight now that Fury is technically retired, he doesn’t meet that narrow definition of having all four belts.

 

I know! That's the whole point of my initial post

 

And Spinks held the lineal and ring even though he was a joke at HW.

 

There's no grey area when it comes to the undisputed crown. You either have all the belts or you don't. Simple as that