Eh, the "it's impossible to change later!" line is the classic one for any of these types of conversations. My experience over the decades has been that while y

Eh, the "it's impossible to change later!" line is the classic one for any of these types of conversations. My experience over the decades has been that while yes, this can happen, it's grossly outweighed by YAGNI-in-retrospect and the eventual shift turning out to not be nearly as painful as people think once all of the people & bureaucratic problems are out of the way.