Finally.

Why the heck would you turn match content off is this scenario?

The consensus

There is no consensus because it depends ENTIRELY on the TV.

On my LG C1 I leave DV on all the time with match content/framerate of course, and the menus and UI look stunning.

On my shittier Vizio LCD TV, I leave it on 4K SDR because DV looks washed out and terrible. But with match content/framerate for content, of course.

There is no single answer. It depends on the TV, and its easy enough to test.

It’s a watch.