@ Callistemon
Not in the US, but the terminology is pervasive. I'm not in the UK, either.
Many people here may dislike my views, but they are views many of today's parents hold. A lot of things have changed in the last few decades, particularly regarding child health and safety. Grandparents insisting on their rules are all very well, but it is important that they keep up with current guidelines regarding car seats, sleep positions, child proofing, diets and screen time. I've heard stories of grannies who thought child car seats weren't necessary, that babies should sleep on their backs, that it was fine to put a drop of alcohol in the baby bottle, or to put cereal in the baby bottle, etc. My husband has permanent damage to his digestive system because he was fed orange juice from 3 months onwards. Most of those things were considered OK 50 years ago, but they are not now. That's why a lot of parents insist on their rules. The rules have all changed.