I read the terms and conditions (not thoroughly) but the only thing that references redownloading apps is “you may be able to redownload content”. I did not see a provision or anything mentioning Apple can prevent you from downloading something you paid for. I’m gonna examine it more thoroughly during the week. But the terms and conditions of the iOS App Store have not been updated in 12 months.Read the Terms & Conditions first. My guess is they say an app "purchase" is actually a license, and Apple or the developer has the right to discontinue (remove) any app at any time.
The issue is, Apple is taking away the only method to download .ipas. And that’s an huge deal. You can now no longer backup your apps. It is all “digital” and I don’t trust it. There are many apps that I have in my library that I have paid for that are no longer available.