Just got my 14" today (16GB, 1TB, 10-core), been slowly, deliberately adding things as I work on projects.
Overall my impression is one of awe and amazement. Perhaps I had gotten used to my 2016 MBP, and it's speed (or lack thereof). But Docker - docker - would take minutes to start up on my old machine, seconds on this one. Maybe cruft will build up in a few months.
I have what I consider to be a fairly tiny/simple next.js/flask web app - but starting those docker containers, running them was always a 45 second wait at least. Subjectively this started everything in 5-10 seconds.
I ran into some weird issues - Xcode failed to install, kept getting stuck after downloading. It blocked installation of other apps, so I stopped it, restarted a few times, finally it cleared.
Also installed node - first v16, then nvm, then v14. Used the package installer, nvm, then let nvm kick off the build process for node 14. That took a good 5 minutes or more. It appears to be running, but will know if there are issues with my lambda functions.
Overall, I'm liking this thing. Not sure if I should bring it in for repair - the dead area of pixels in the middle of the menubar - but my guess is it's intentional