I replaced a python/uwsgi stateless stack with an elixir stateful system. Flipped it over and it worked flawlessly, and hasn't died once in several months of operation. Latencies are way down, and operation of it is simpler. Full deploy to the head node is one command, not an ansible script.

I guess part of it is that I'm lazy and haven't learned supervisor strategies like kubernetes (the place I work doesn't deploy kubernetes anyways)

This video is instrumental in giving me the confidence to do what I did: https://youtu.be/JvBT4XBdoUE