[vorg]

> Ceylon. As a language, it's a great superset of Java

You're using the word "superset" quite loosely. A superset of Java would compile Java syntax into bytecode with all the same semantics as the equivalent Java code, as well as bring its own additions, which Ceylon clearly doesn't do. Groovy claimed to be a "superset" of Java but a handful of various syntactic elements behaved differently e.g. the == operator, catching many unawares. It's not introducing any Java 8 syntax changes, its backers flippantly saying "we'll leave them for Groovy 3". They tried to maintain a rough equivalence between the syntaxes for years by using annotations instead of new keywords, then one day its project manager changed "@Trait" to "trait" in a move that reeked of favoritism.