How commercial companies decide which programming language/s to use is something of a dark art.
Exactly my point. How can they survive in a free market? Shouldn't that "invisible hand" slap them and then an "invisible boot" kick them out of the market when their "black art" did not work?
My guess: perhaps murking the waters, creating a nexus of dependencies and a web for trapping unsuspected clients (none-the-less: they are still idiots to fall for it) is a company strategy which works better (i.e. maximises profit) than choosing the right language(s) for the task and the right people to programme it. If that's true, then the free market, at least its computing sector, is seriously sick. But currently that field is the forefront and the spearhead of the economy.
bw, bliako