Am I so out of touch? Old dungeons in M+ is a huge turn-off

For a while now I'm been solely a M+ player as I really enjoy the format. However I sat out the entirety of SL Season 4 and now considering just giving up on WoW entirely because, to me, the idea of going back and replaying dungeons I've done hundreds of times already is just such a huge buzz kill for me.

Yeah, I hear you, this would have been the fourth Season in a row of the same dungeons we've been doing all expansion. Yeah, it's kind of old by now but it's still fresher than other dungeons I've also done the same amount already years ago. I've already done Karazhan and (upcoming in DF) Halls of Valor as M+ to death already.

I've been playing nearly continuously since launch and I've already "completed" every dungeon in the game. I know most of them by memory and have seen them all countless times. I don't want to ever go back and do them again, I want to play new content. I'd find it more palatable as just a "last season" kind of thing like Season 4 where they give everything this last hurrah and bring back some old content as a palette cleanser. Then I could just skip the last expansion of every expac and still enjoy all the new stuff while it's fresh.

Maybe WoW is just moving on without me, maybe the new audience is people who haven't been the audience the whole time.

Am I in the minority here?