It’s easy to blame IT, but usually they have either business objectives assigned to them or they need to justify it to the business.

So I see the “if it ain’t broke don’t fix it” more of a business problem and not an IT problem. I worked at one organization where for any networking work, you had to bill that time to a business project (which was usually a customer contract). proponents of IPv6 inside a business probably seem to the business like they’ve got excited over pointless science projects with nothing to ‘bill’ their time against