Fable 5.2 may finally be so far ahead of my intelligence that it's not useful for day-to-day tasks. I gave it something to do in a personal project of mine, and took my standard flow of "let's talk about this, explain the options, tradeoffs, blah blah blah" and after 5 minutes my vision was blurry and I was doubting if I even knew how my own project worked. Gave it to Opus 5.5, and instantly got back on track.