Hello,
the available documentation on Orca looks brilliant and the source, Hasso-Plattner-Institut in Potsdam, has an excellent reputation. It looks all very professional.
I am therefore most suprised that I cannot find any tracks of usage of Orca, neither here, nor elsewhere on the net, and not even any serious discussions.
Does anybody here have practical experience with Orca?
Critics?
Recommendations?
You could contact him to find out if his work is relevant to you. He isn't comfortable discussing it on the Pharo lists himself.