I agree. Granted, it can be easy to muck up compile times if you factor poorly, and get those cascades of &quot;Compiling 1 file...Compiling 12 files....Compiling 100 files&quot;.<p>But, I also do a lot of front-end web work, and Webpack takes a lot longer to rebundle my files than Scala takes to compile. I work on a Rails monolith that takes as long to start up as my Scala project does for a fresh compile. So I think the complaints are way overblown.