Stack adoption is orthogonal to maturity or ease of use. Recent experiences have indicated to me that the main factor in which stack a company uses is basically the whim of whatever developer was tasked with the initial project creation.

Nobody's going to tell him no and there's not going to be significant discussion about the merits and even if there was, there's no best practices to lean on to make the decision rely on anything other than pure emotion.

Stack adoption makes people have to actually use them, which then gives them something to complain about (whereas before they could just ignore something not to their taste).

"There are only two kinds of languages: the ones people complain about and the ones nobody uses."

- Bjarne Stroustrup