Only one reply saying you should involve your wife in this decision. Not enough.
You need to involve your wife in this decision. Her use case is nothing for a modern laptop, either Windows or Mac. Anything new will run like a dream in comparison to what she's got. Literally anything. Get her to a physical store to type on the keyboards and make sure she likes whatever models are in contention. This is highly personal and subjective so other opinions aren't worth much.
I do think it worth mentioning that switching ecosystems isn't something to do lightly. She needs to be involved in that decision. I've used both Windows and Mac. I'm comfortable with both, but generally prefer Windows. They are way too different to treat the possibility of switching flippantly.