word for retaining irrelevant parts of old design

Is there a word to describe the process of retaining certain aspects of design just because the users are accustomed to seeing it although removing it would not make a major difference. Context: Consider a very old software from 80's which is being obsoleted with new UI. The new UI is being created to look pretty similar to the old one like accepting date in different input fields manually rather than a date picker just because it would be consistent with the older software. Since, the people who decide are apprehensive of new ways of doing things, they want to "keep things consistent" to crazy levels.

Criteria: While not limited to software, I am looking for a word which I could use when I want to say like -

"I know you crave for consistency, but its high time to stop [the word], otherwise there may be serious doubts about our creativity"

Non software example: I have read that rivets served a purpose on jeans at the time they were invented, but now they are retained only for consistency.

The closest word I have seen so far is- skeuomorphism. While it has a connotation of taking inspiration from older known objects, I wasn't quite sure if it fits in the above context.

Solution 1:

In biology, 'vestigal' has a similar meaning. Perhaps it works for your case?