Everybody privately bitches, and some publicly, about scala compile times -- it's slow! Even incremental builds can be painfully slow when you change a file that then triggers the recompilation of a host of other dependent files. Scala is both completely & utterly awesome and not at the same time, impressive, I realize this truth daily ;-)

And yet people -- hundreds of thousands of them -- do manage to get useful work done in Java on a daily basis! I do not want to be one of those people however because I do not like suffering.