Starting with patch 8.3, and going into the likely 2 year run of shadowlands, there will be a consistent, supported and intentionally important avenue of progression content for not one, not five, but one TO five players! Role agnostic, scaling to size, this could redefine how we look at this particular MMO!
The people I play with formed a pretty tight circle of friends that enjoyed steamrolling LFD in WOTLK for badges and profit back in the day. As the years rolled on and we got all adult and busy, it's become almost impossible to line us all up for a 5-man run. If M+ had hit in WOTLK, we likely would have gravitated toward it, but in this time of heightened accessibility we've basically replaced dungeons with World Quests because we just never line up. We get in the occasional island, and we really appreciate that it's 3-man content... but with the idea of one TO five of us having something to do together, we haven't been this excited since our brief return to city of villains (which has always had level and group-size scaling content) when it came back with quasi-official servers!
Honestly, I have nothing in common any more with the core dungeon running community, because to do that content I have to deal with people I don't know and, to be honest, I don't play this game to do that. It's not a social "meet people" setting, it's a place I play alone or with friends, and oh boy are we ever excited to have an avenue of content that fits the exact number of people we can line up on any given day: One TO five!
We can't be the only ones looking forward to this, and I know we'll be leaning hard on this content to do our best to "vote with our time" and tell the devs "more of this please!"