I'm more interested in a language like gleam, but the BEAM VM does sound appealing. But one thing I have been wondering is what is the hosting story like for BEAM languages?

Is there easy tooling for deploying to something like AWS ECS and having nodes communicate with each other?

libcluster[0] has a bunch of strategies to form clusters. It seems that ECS supports service discovery through DNS, so the DNSPoll[1] strategy should work.

[0] https://github.com/bitwalker/libcluster [1] https://hexdocs.pm/libcluster/Cluster.Strategy.DNSPoll.html