That makes sense, but I’m not sure that’s what the GP comment was talking about. For instance, both Samsung and non-Samsung Android devices have threaded/serial message notifications (?) which are very helpful for conversations, whereas iOS still has the primitive notification-per-message system. I’ve learned to live without it now as I prefer iOS for its advantages, but I’m frequently expected to make sense of several notifications out of order for each conversation when one would suffice.

Bixby and the Samsung crap are the reasons I'll never buy a Samsung phone. The only redeeming thing is that they're not made in China.

I use a Samsung and my SO an iPhone which I'm the one "administering" and I can tell that both notifications can be customized at (our) will. I have no idea what you mean there.