> If you signup for Netflix using the feature, you can't cancel your account and then signup with a new Apple email, it will only allow you to login with your original one.
You absolutely can. You can generate as many as you want, whenever you want
You absolutely can. You can generate as many as you want, whenever you want
I have only used the "Sign in with Apple" feature directly in apps, which only ever lets you create one for that app.
However, apparently with an iCloud+ subscription, you can generate arbitrary email addresses from within iCloud itself, and then use those wherever you like.