Anyway, things evolve. Things do what they do. Heck, the analogy of a river flowing is used to describe traditional ryuha as it is. It flows, it changes slowly, it sometimes takes a hard left turn.
What a lovely comparison! Traditions changes to fit modern times and the most important factor of it is people IMHO. Something that can't adapt to modern times near by oblivion. But it's still question: is traditions itself changes or traditions gets new shape only?
Have practice aikido in clothe other than keikogi influence on aikido traditions? Seems to me it's personal attitude more than rule.