it would say that Scala 2.10.x works fine on Java 6, 7, and 8 (is there a minimum version that works well on 8?), and 2.10.7 has minimal Java 9 support that is unlikely to improve further

likewise for 2.11.x; 2.11.12 is the release that added minimal Java 9 support

2.12.x requires Java 8 minimum; 2.12.4 is the first version with minimal Java 9 support

and then maybe some content inspired by scala/scala-dev#139 about remaining issues and/or missing features

I'm sure there's more to say, but that could be the initial skeleton

this would go under http://docs.scala-lang.org/overviews/index.html