The consensus here seems to always be leave in SDR and use match content, but I’ve had no issues with leaving Dolby Vision on all the time. SDR content like youtube and TV shows that were never mastered in HDR look 100% fine to me. Part of the Dolby Vision spec is that it forces your TV into it’s most color accurate settings so why wouldn’t I want that as well? Using an LG C2 by the way.
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.