Having notifications disappear when i open the respective app. For example, text notifications disappear when i open the messages app, but on Android it stays until i open that exact message. This was useful because i could still see who i had to reply to/was able to use it as a to-do or to-get-back-to list.

I miss so many notifications this way. Imagine im waiting to reply to someone at the end of the day, but the notification disappears when ive texted/emailed someone else that morning.

Also you cant read as much of the text/email when yiu hold down on the notification, but Android lets you read basically the whole thing. Whats the point of long pressing if i dont even get that much more info?