"A quick way to judge a language implementation is by inspecting its string concatenation function."
miniblog.
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Really cute introduction to Smalltalk programming from 1983. It starts with an explanation of mice and "scroll menus" (scroll bars), then shows cross-referencing code, lints, autofixes, and inspecting instances of newly defined objects!
https://youtu.be/JLPiMl8XUKU
I'm not a text supremacist. I've seen fabulous GUIs for inspecting data (database explorers, morphic halos, browser tools). WYSIWYG has a ton of advantages.
Yet I can't find a rich text UI I prefer over writing markdown directly. It's less surprising.