Is Mutan still used as language?

Question

Mutan was designed by Jeffrey Wilcke as a Go-like language for contract development. Is it being used and developed / maintained?

Answer 1

No, Mutan was deprecated in march 2015 in the favour of Solidity.

Solidity was introduced with the intention to (possibly) replace all three initial high level languages (Mutan, Serpent and LLL) some day.