+1 I still think fondly of the InterLisp environment on the Xerox 1108 Lisp Machine my company bought me in 1982. You can find emulators for InterLisp, but the experience is not the same.

Everything I know is from the documents, papers and videos that I manage to scrap from the Internet.

My experience with Oberon, lead me to track down how Wirth learned about such systems.

Additionally, I got to learn Smalltalk in the form of VisualWorks before Java was known to the world.

So I extrapolate my experience to how it might have felt back then and find it sad we are still trying rediscover it.