I've seen a significant slowdown in SFR purchases in my neighborhood (Issaquah) over the past month or so. Homes used to be on and off the market within a weekend... and now many are taking their homes off the market after being up for three or more weeks.
Saw this several weeks ago: https://www.seattletimes.com/business/real-estate/...
"But the regional averages mask the extremes in neighborhoods getting the most apartments: A stunning 26 percent of all apartments in the core of downtown Seattle right now are empty, up from just 5 percent a year prior (the number is skewed by brand-new buildings that take a while to lease up, though vacancy rates at older buildings downtown are also rising)."
Here's the article @Steve Vaughan: https://www.seattletimes.com/business/real-estate/... (tl;dr: 65 cranes in Seattle)
Massive building projects coupled with a huge growth cycle nearing the top of what the market can support is my guess. Not to say the growth is over, but it certainly can't continue forever either.