Modern IDEs don’t improve the feedback loop much unfortunately, more often it’s quite the opposite. They are slow, bloated and distracting. Some of them might be good at renaming one’s variables as part of their refactoring offer, but otherwise the situation is quite often bleak.
SBSL+SLIME+Emacs usually put one in the flow state in no time. That’s what keeps amazing me and keeps me productive.
And then, Claude seems to be quite alright discussing tricky Common-Lisp-related stuff.