I'm sure they do but, as in the case of Alfred, they're notified multiple times that there is a newer version and that their OS may not support all the features

I'm sure they do but, as in the case of Alfred, they're notified multiple times that there is a newer version and that their OS may not support all the features of the app and vice versa. You have to explicitly ignore the dialog boxes and install the new OS anyways to get the behavior being demonstrated in the OP.