We run a large (1M+ LOC) Scala codebase and don’t have these particular issues (we have other issues like bitrot in libraries but that’s the same in all languag

We run a large (1M+ LOC) Scala codebase and don’t have these particular issues (we have other issues like bitrot in libraries but that’s the same in all languages). You need to sort of put your foot down on using out there FP stuff like some parts of scalaz and turning your code into line noise. The non-FP parts are nice and useful though. I can go on for days on how someone wrote some unreadable Scalaz that had atrocious performance (even with @tailrec) and someone rewrites it in plain Scala for a 100x perf win. Still.. would I use scala again? Yes, but mainly because it allows you to use high quality Java libraries that are unmatched by any other language. It’s also just much nicer than Kotlin. We also really like Akka...