Analysis of information sources in references of the Wikipedia article "Erlang" in Greek language version.
I do not believe that other languages can catch up with Erlang anytime soon. It will be easy for them to add language features to be like Erlang. It will take a long time for them to build such a high-quality VM and the mature libraries for concurrency and reliability. So, Erlang is poised for success. If you want to build a multicore application in the next few years, you should look at Erlang.
Virtually all language use shared state concurrency. This is very difficult and leads to terrible problems when you handle failure and scale up the system...Some pretty fast-moving startups in the financial world have latched onto Erlang; for example, the Swedish www.kreditor.se.
The largest user of Erlang is (surprise!) Ericsson. Ericsson use it to write software used in telecommunications systems. Many dozens projects have used it, a particularly large one is the extremely scalable AXD301 ATM switch. Άλλοι εμπορικοί χρήστες: Nortel, Deutsche Flugsicherung (ο εθνικός οργανισμός ελέγχου της εναέριας κυκλοφορίας της Γερμανίας), T-Mobile.
I do not believe that other languages can catch up with Erlang anytime soon. It will be easy for them to add language features to be like Erlang. It will take a long time for them to build such a high-quality VM and the mature libraries for concurrency and reliability. So, Erlang is poised for success. If you want to build a multicore application in the next few years, you should look at Erlang.