I just had a Jr dev do this to me. Came in, so bold, and said our patterns were stupid. Told him no, while there are things to improve it's not worth the effort to rewrite hundreds of classes over a personal preference.

Of course when he inevitably brought it up again, I told him okay, schedule with our architect, that's how things work after all for major rewrites. Man, was that meeting entertaining.

Kids, we know it could be better. But we also know things like level of effort and value. Your CS330 patterns are really cool, we know them too. But we aren't going to build them.

3 years later, hands unfinished work to junior dev after the system they re-invented has also become obsolete