2018
Romer - What do you mean "thread-safe"?
    https://www.youtube.com/watch?v=s5PCh_FaMfM
    https://github.com/CppCon/CppCon2018/blob/master/Presentations/what_do_you_mean_threadsafe/what_do_you_mean_threadsafe__geoff_romer__cppcon_2018.pdf