A modern programming language that makes developers happier.

kotlinlang

Agreed this is the biggest win:  Modularization has other benefits too; on our project we follow an MVP architecture and with an expanding team it's sometimes hard to police against Android specific View dependencies bleeding into the Presenter/Model layers.  Adopting strong Modularisation improved build times and also enforced 'purity' of Model/Presenter layers - the modules for which can now be plain Java modules; avoiding Android-specific compile &amp; packaging overhead.

With that underway we would like to pursue an incremental `kapt` as well.