This is not caused by Vary but by the app being so.. variable.
If you segregate content-type/language by end-point then the variability goes away. But now you have a plethora of end-points. The complexity can get moved around, and in this particular case the complexity for the caching layer can be removed, but the complexity isn't gone.
If you segregate content-type/language by end-point then the variability goes away. But now you have a plethora of end-points. The complexity can get moved around, and in this particular case the complexity for the caching layer can be removed, but the complexity isn't gone.