I would say an 11-36T is a wide range cassette in the traditional sense and even up to fairly recently. Now that mountain bikes have gone 'HAM' with their 1x gearing and cassette cog count, 11-36T is simply limiting for the bike outside of a double chainring. I'd like to say anything at 40T or north of it is wide range given the present trend of MTB and all road gearing.

Cues and Essa derailleurs working their 9-speed and 8-speed cassettes (respectively) have big jobs to do getting to their lowest three gears. Those cog jumps are massive--Shimano "Mega Range" freewheel jump massive. That's going to be rough on any derailleur. The jumps on Deore 12-speed cassettes are constant throughout the range, so it has an easier job to do there, just harder by needing to be precise over much tighter cog-spaced tolerances.