wearing a headcover would be one thing. It is mefurash from the Gemora that _married_ men were supposed to wear a sudar (at least Talmidei Chachamim in Bavel).
Some other changes are documented in Gemora. Kesuba was assessed only on real estate. Later on, it was also assessed on movables. This confirms that “original” is not necessarily the “correct” one, especially when there was a beis din ruling to change it.
Days of the week when we do weddings changed a number of times.