I liked my experience with fly.io.
But then… trying to deploy applications which deppends on erlang nodes (e.g https://github.com/membraneframework/membrane_demo/tree/master/webrtc_videoroom) made me crash with a common error ({:error, :connect_to_cnode} · Issue #19 · membraneframework/ex_dtls · GitHub) if you explore further. Fly.io explores ipv6 networks, which erlang cnode does not support.
