preseznikI've been using my LG CX 55'' on my desk since launch and a 4k Samsung 55'' for a few years prior to that. Regular depth computer desk, too.
You're just wrong.
It's super comfortable and it's annoying having to go to anything smaller (at work, LAN parties, for example).
No "neck rotation", ever, in all of these years.

ValantarSo... your eyes are on stalks? You're actually saying you don't have to rotate your head whatsoever to focus on the edges of your monitor? Because with the human field of vision and a normal desk viewing distance (arm's length, 80cm-ish), that isn't practically possible without severe eye muscle strain. Now, you might not be sensitive to neck strain, and if so, good for you. However, your experience is not universal, and poor monitor ergonomics is a major cause of serious long term stress injuries in necks and backs, so I would caution against making any type of recommendation without taking this into account. Your recommendation might literally hurt someone.

MusselsI did it for years with a 40" screen, then found 55" too big in the same setup
Console ported games for example, the UI and HUD are designed to work with that size

The odd person can handle it, comes down to use case. 27-40" seems to cover 99% of peoples size preferences and physical setups.