Distribution is king. Kudos to Ramp for that. My weird thesis is that for whatever reason Ruby on Rails shops just seem to survive more. I wonder if someone did a stack specific survival rate analysis.
Ramp is mostly their Python monolith. They have a blog post about their use of Elixir for one service but it's really not their core stack.
Brex was a lot more all-in on Elixir, including being one of the languages "stars," but moved to a more conventional stack (IIRC Java/Drop wizard microservices with Kafka to talk between them).
