> I'm wondering if there are plans to replace Java with Dart or Go on the Android platform.

There are very few languages choices where I prefer to keep using Java. Go and Dart are two of these.

I'm a dedicated Apple skeptic, but Swift is nicer than both of these trainwrecks.

If what the article claims is true (that Dart can be used to target µCs), which I highly doubt, it might become interesting for me. My doubts arise from the fact that the standard library for a language makes some opinionated design choices, and in my opinion it's impossible to make an idiomatic library that works the same (and is usable!) in a GC context (existing deployment) and a non-GC context (embedded).

It's sad that of the dynamic languages, Python and Ruby are performance deadends, and LuaJIT is too obscure for most people.