True up to a point but any professional developer needs to be able to pick up a new language quickly - I had to learn Pl/1G to work on a Map reduce code base.

True up to a point but any professional developer needs to be able to pick up a new language quickly - I had to learn Pl/1G to work on a Map reduce code base. I was assuming a more rational choice but then developing serious technical software in pascal instead of fortran in the 80's was not a rational choice in the first place.