It's always funny to see how these things get interpreted. :-) a) There is a lot of work going on at the foundations of the language – most of the stuff is unl

It's always funny to see how these things get interpreted. :-) a) There is a lot of work going on at the foundations of the language – most of the stuff is unlikely to be felt by users. b) Compilers are hard, there is very likely no "nice" compiler out there (except for toy languages). This has almost nothing to do with syntax variants. Nevertheless, there are multiple groups which are working on improving the codebase. c) Concurrency is hard to get right, especially "traditional" approaches like synchronizing, locks, etc. If it's not necessary, don't use it. Otherwise use the right abstractions for your problem, as mentioned in the next paragraphs.