Did M+ save WoW or did it kill it?

like raiding ain’t killed wow either with the negativity in pugging it. if they quit focusing on endgame dungeons and raids they might actually keep people by making fun things to do in the world besides endgame. mythic+ saved it for me how long can you raid til its just like welp thats all their is to do all expansion for 17 yrs. and they really fix pvp the game would be so much better to.