A remarkable number of developers continually undo changes or copy-paste code so they can refer to the previous implementation! https://web.eecs.utk.edu/~azh/blog/yestercode.html
I definitely use the GitHub web UI as a reference for the current code sometimes.
miniblog.
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Today I learnt that a continually blinking caps lock on Linux signifies a kernel panic: https://unix.stackexchange.com/questions/3840/the-caps-lock-and-scroll-lock-lights-are-flashing-and-everything-is-frozen
(On the plus side, it's the first time I've encountered this despite using Linux for years.)
... although I've never met anyone who had internalised all Emacs builtins. Emacs is all about continually learning.
"a[..] system must be continually adapted or it becomes progressively less satisfactory" -- Lehman's 1st law http://t.co/ruWaSdzojo