Well that is true, the vector tiles do have the opposite problem of having too much data when zoomed out, but using raster beyond level 21 is just completely wasteful in terms of storage required. Most of the tiles will just be one colour. I'm not sure how level 28 is even possible without taking up multiple HDDs.
I still think that the more proper solution would be to instead cap out the vector tiles on the other end, not going lower than say level 5.
I still think that the more proper solution would be to instead cap out the vector tiles on the other end, not going lower than say level 5.