[nomel]

Progress to a standstill? Making code that solves problems, so that money can be made, is the goal of any software house that wants to ever have a positive cash flow. If it were easier or cheaper to hire for and write code in Haskell, which would make this goal easier to achieve, then it would already be used, and this the case in some domains. Beyond those specific domains, not many companies have the spare resources to donate to progressing the ideas/ideals of software development, unless there's a real, monetary, ROI. For many houses, there is none, at the moment.

It's always cheaper/easier to optimize in the environment one is currently in.