I just sent Amazon a feedback comment asking if they have either of two features:
1) Notification when an item on your wishlist becomes unavailable, and/or
2) The ability to easily switch from an unavailable edition of something to an available one.

I had quite a few items on my wishlist that had become unavailable. Some of them are really no longer available, but a lot have just changed editions. I want to 1) find out the items are not there without having to go look all the time, and 2) have an easy way to switch.

Do these features actually already exist, and would anyone else use them, if they don’t?