In the case of Erlang the answer to your question about meaningful differences is: oh yes! I could list more, but there are two: - support for concurrency. Aft

In the case of Erlang the answer to your question about meaningful differences is: oh yes! I could list more, but there are two: - support for concurrency. After tasting it you never will want to go back to techniques normally used in the languages you listed - data immutability, which makes reading code so much easier.