I cannot find the documentation for gen_statem anywhere; all I find is references to some specific examples.
"This is a new behavior in Erlang/OTP 19.0. It has been thoroughly reviewed, is stable enough to be used by at least two heavy OTP applications, and is here to stay. Depending on user feedback, we do not expect but can find it necessary to make minor not backward compatible changes into Erlang/OTP 20.0."
It's honestly hard to overstate how excellent seeing that note is. It's a significant change in tone regarding community involvement in the design, structure, and implementation of core OTP components. It's really exciting to see.
I can't help but see this as part of a halo-effect that originates in the inclusive and thriving community around Elixir. It really seems like both ecosystems are getting a lot from each other right now.
My idea here is not to remove merit from Elixir in helping the ecosystem, but in pointing out that the Erlang community itself is expanding on these ideas of involvement and a more open design.
Also... I have a "6x Programmer" hat for you the next time I see you. When you mentioned it after seeing my "#7 Dad" hat at EF SF, I couldn't help but have a couple made.
The internet may have ruined me, but I somehow expected the thread to end up in insults and nasty things after a while; and here I am, amazed. Really well done.