A couple things that absolutely fascinate me about framing: prior to all the data coming out on this, we subjectively knew that framing was a real thing (I’ll never forget the effusive praise for Charles Johnson when we traded for him back circa 2000ish). However I don’t think we (or at least myself personally) realized quite how often some guys were getting extra calls. I kinda figured it was one here or there, but the data suggests that it happens all the time- several times a game. In retrospect, it makes sense too- the pitchers are the best of the best at this, and essentially live on the edge of the zone the entire game.
And secondly, I always knew it was a huge difference between being 2-1 vs. 1-2 or 1-0 vs. 0-1, but it’s super cool to be able to translate that combined with framing data into actual expected runs saved