At RubyKaigi Takeout 2021
https://rubykaigi.org/2021-takeout/presentations/p_ck_.html
ref: https://github.com/pocke/rubykaigi-2021
If you want to click in the slides, I recommend seeing https://docs.google.com/presentation/d/e/2PACX-1vREU6ZguqLxGk_k1l3zvKbRo_TbMTKN3yEgfzrjA85foVXrmeYvWnOTefsaBycsb9m6H924VsZw_YKt/pub?start=false&loop=false&delayms=3000 instead.