It's the difference between "this thing has X property" (termination or able to save for offline reading) and "this thing _obviously_ has X property, in a way t

It's the difference between "this thing has X property" (termination or able to save for offline reading) and "this thing _obviously_ has X property, in a way that you can tell without any expertise, or doing any investigation". How important this is to users, or whether it is worth it is something I've not commented on, but it is a difference.