I've put on my retrocomputing hat today and emailed Symbolics regarding purchasing a license for Genera. I'm hoping it's cheap.
miniblog.
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Really cute video demo of the hypertext documentation in Symbolics Lisp Machines: https://youtu.be/7DxYj32cvoE
The speaker carefully explains why links are a good thing! It also lists history in a pane (rather than a back button) and has a stronger notion of navigating hierarchies.
Astoundingly, the US Department of Defense is still paying money for Symbolics Lisp support!
I'm also impressed that some of the Symbolics team are hacking on Julia.