The new boat has a lot of equipment you don't need(emphasis on "you" and your experience) but you'll likely use whatever you find useful.

But the new challenge is your wife. Single handing is much less complicated. It sounds like she is beyond ready and capable as a sailing partner(a different quality I think, you're lucky). But I suspect you know, what she doesn't know, yet.

I think there is one commonality in couples that don't sail well together. One is scared. And no, it's not always the wife, but she usually gets blamed as the reason a couple doesn't sail together or they get out all together. Sailing as a couple isn't easy. It takes time and work for both to be a success.

I'd say, take it slow at first. Stick to Maine, sail for her. Show her the best of sailing, the worst will come along on it's own. But you could be responsible for spoiling it(we all do). Sail for her. It sounds like you have the high potential of a sailing partner that will rise your own experience, even beyond your expectations. Sail for her.