I'm also seeing benefits, and I'm on pretty much the same stack as you. The METR paper I'm citing was misquoted a lot (N was small, and it wasn't a favorable setup for AI tools), but the most important finding was that it's very easy to fool ourselves about productivity benefits.

Am I going to cancel my Anthropic subscription? Certainly not, but I'm not going to pretend like my setup is The One True Way. The plural of anecdote isn't data. Nobody has this figured out, nobody.