[pjmlp]

That is a good example why betting on the platform languages is always a long term safer bet than betting the house on guest languages,

Eventually they won't keep up with the underlying platform.

[pas]

It's not like it isn't working. Scala runs fine on JDK13 (probably 14 too, but we currently run one Play project in prod on 13).

Java is a pretty safe bet, as it has an outstanding backward compatibility track record.