IBM Cloudant runs everything CouchDB which is written in Erlang as does Amazon for SimpleDB. WhatsApp and a bunch of Pinterest are written in Erlang (they may actually be in Elixir, but on BEAM).

To my knowledge Ericsson still writes most things in Erlang. Yahoo uses it for a couple large services. My company use PagerDuty which is also written on BEAM.

I'm sure there are many, many other things in not familiar with, but claims of Erlang's demise are greatly exaggerated.