Ironically enough, I was thinking about the same thing in the morning of the day I replied to you, that gives the amount of data JS provides in the runtime, do we really need Smalltalk for a live system? I agree with you fully.
I guess something about me doesn't want to accept that BB can be a superior GT!
I've been using it on and off for a while, but never got around to doing any major customisation mainly because I hate reinventing wheels (and also I was busy with other things). But I now am looking for something like a cross between Warp and Zed's Delta (which is a very nice design), and bb might be able to give it to me.
EDIT: OK, the plugin marketplace is much more browsable than the last time I looked. It'd be lovely to have a gallery where people can show off their own configs. Maybe I should make one...
Then I threw actually useful things at it: find this directory of pdf scans, and create an interface where I can browse the files, preview them, and query an lmstudio server, and auto-rename the pdf based on the content.
Another is to ssh to a remote machine that has a particular file organization structure, and give me a preview gallery.
Nothing is particularly complex, but I couldn't be bothered to making that myself. It's also something that I would've used in emacs (the preview function is like dired-preview-mode in emacs), but a graphical interface would perform better.