I get your point, but it feels like things have swung too far in the opposite direction. Compared to other engineering (chemical, civil, industrial, etc), we do a lot of change for little good reason. There's too many ways to solve the same problem, which kills "best practice".
Once these cobol powered servers were accessible to hacking, “not changing anything” no longer worked.
https://www.computerworld.com/article/3181809/cobol-plays-ma...