I’m working at a place like that now and it’s been an eye roller. After ten years on the project one of the problem people has finally seen this as a problem (though I haven’t heard him admit that he contributes). He’s looking at code now written by two people who have been copying his code style for years, and suddenly feeling the pain of it. It’s great he’s growing, but he’s over forty and should have learned this years ago. I blame a mix of things including staying at one place for far too long.
And I keep telling him this code used to be worse, but I’ve been chipping away at it for some time.