Sorry to be long-winded. It's taking my brain a while to get there is all!
What I'm finally getting to is that I'm not sure if "out of date" is relevant. Ways, or styles, of parenting and grandparenting are as varied as ever and constantly changing. I don't think JC was saying hers was the only way or even a good way, just the way she does it. That's what I liked about the article, plus the clear message that if grans don't want to be nannies (for whatever reason), they don't have to feel guilty about it.