References for your claim that "The whole point of Oberon was the Smalltalk ... Mesa/Cedar like experience." and "It is definitly true for Oberon OS System 3." I was at ETH until 1993 (and then again from 2000 to 2005 for my PhD) and have other information directly from the sources.
No magic, just facts, Luke; don't search too long; look at the introductory sections of "Project Oberon, The Design of an Operating System and Compiler" (ACM 1992), "The Oberon Companion, A Guide to Using and Programming Oberon System 3" (vdf 1998), and Gutknecht, J (1994): Oberon System 3: Vision of a Future Software Technology, Springer, Software.
