I think the dependencies (like Netty for a web framework) would have to be migrated first. Scala native has a subset of java core libraries (from e.g. io, nio,

I think the dependencies (like Netty for a web framework) would have to be migrated first. Scala native has a subset of java core libraries (from e.g. io, nio, util) rewritten in Scala, which could be a blocker if there's anything missing.