Well, I've been working in financial and data services for many, many years now and I can tell you as much: many of the code bases I've been dealing with (and a

Well, I've been working in financial and data services for many, many years now and I can tell you as much: many of the code bases I've been dealing with (and am dealing with) written in less strictly typed languages (much Python, lots and lots a lot Java) are riddled with hidden runtime errors that you'll just never see in Scala. If there's a bug, it's usually some modelling problem or some conceptual issues, not the implementation of the code. I've much more confidence in the code I've written in Scala than the code I've written in Python or Java and I never ever had to get up and pick up the phone in the middle of the night because some production issues with code written Scala.