> a band aid for people who either can't or don't know/care/want to treat their rooms and position speakers correctly.
Indeed, but I'd bet many people are in the "can't" category. Especially for low frequencies, you need pretty hefty treatment to make a difference, which is oftentimes impractical to install in a room which wasn't designed for that. And I seriously doubt any sizable number of rooms in apartments are designed for that. Combine this with the ungodly amount of snake oil peddled, and I can easily understand why many people look at Dirac and similar solutions.
And while they are band-aids, in many cases that's enough. I used to live in a studio apartment where room correction made a night and day difference to my listening position. Elsewhere the sound wasn't that great, but I didn't really care since I never listened from theme. I was renting, and the space was rather small, so there was no way to install any useful treatment.
In my current apartment it works much worse, it's actually close to useless. But it's rather bigger, so I could put in some treatment. But I've spent a lot of time researching this, and it's still not clear how to go about doing this. People can't even seem to agree on what kind of material to look at. And while I love listening to music, I'm not keen on investing thousands, plus time living under construction for weeks just to throw multiple solutions at the walls and see what sticks.