This is just one [massive] project, but HMRC are rebuilding in Scala atm, & from talking to the developers working on the project, bit of both: selling it as a

This is just one [massive] project, but HMRC are rebuilding in Scala atm, & from talking to the developers working on the project, bit of both: selling it as a better Java with all the associated interop with existing stuff, but individual devs attracted by the functional side. The Guardian seemed to have similar reasoning.