I wrote the lambda piece, you could say re-arch saved us the money (although we could only re-arch cheaply because we already had other massive scale serverful systems in place), but I don’t believe I could have made it as efficient and dependency free in any other language.

i had been developing in ruby for over a decade and about 5 years of Node exp at the time.

im not a language enthusiast and mostly write in go today.

Go is my current favourite as well. Heck, just replacing python with Go would have done similar numbers. The key is “replacing python” and “rearch”, Elixir was just the mechanism.