So the tl;dr is that building more housing, of any kind, will alleviate prices at the lower end of the market. I think this makes a lot of sense, though I find it weird that he starts off by saying that new construction doesn't have any impact, and then finishes by saying the opposite. I hear this same thing a lot from economists who say the impact of new construction is too small because it only accounts for <1% of the total housing stock each year at best, but that doesn't make sense to me - what other levers are you going to pull? Immigration?
Anyway, I'm putting all my hopes on remote work.