instead of the old "5]", "5]]", "5]]]" sequence. (I was motivated
to do this when ILISP and SBCL got into arguments which left me
deeply nested in the debugger.)
+* When the profiling interface settles down, it might impact TRACE.
+ They both encapsulate functions, and it's not clear yet how
+ e.g. UNPROFILE will interact with TRACE and UNTRACE. (This shouldn't
+ matter, though, unless you are using profiling.)