IMHO, all Pharo beginner tutorials should start by showing off Cmd - dot (or Alt - dot, on Win / Linux). Not just because it's cool, but because it's necessary :) Cheers, Henry
Very true. Yet, and I have already mentioned this years ago, it is technically totally possible to properly detect massive stack growth, before things get out of control. Sadly, VM people think this is not needed (or too costly).

Not entirely true :-) There are smalltalks out there that detect such stack growth and do the same as CL, 
throw a (resumable) exception. Super-handy. Some of them have this for at least 10 years now :-) 

And, it could be done with virtually no costs at all - hardware check for this anyway.

Jan