Xs Max here, as by now on my usage I can tell that:
- Notifications are sort of broken in some cases, specially in WhatsApp (only displays name and not message, sometimes you get two, one with name and one the old way) and some notifications like with the screen recording one, if it is only that, it would not go away if you delete it.
- Share to a Twitter app is sometimes broken, the share sheet appears and the disappears (from photos app).
- writing this message, the cursor gets misalign with the text box, so it gets situated over post reply.
- The phone is fast and Face ID is fast too.
- Music sometimes don’t stop playing if you are hearing thru lightning.
- if you 3D Touch, it will be super slow to show the pop up on app actions, but long press is faster (dead or misbehaving 3D Touch).
- Aligning apps on the home screen it’s chaotic sometimes, because you move it to one corner and it ends one row up and a lot of apps moving everywhere and returning to the place they should be.
- Swipe is cool.
- WhatsApp sometimes don’t display new messages on conversation, it puts a blank space, if you leave and go back it shows the new messages.
- Share sheet to WhatsApp, when you select a contact, the next button is over layer over the contacts.
- You can't unmute Instagram stories with the volume rockers, you have to toggle the physical mute switch to unmute.
- You can view and synchronize an iOS 13 iPhone in iTunes 12.9.2.5 (not the newest) in an not up to date MacOS Mojave (14.14.3)
- Mail app still gives you the unread mail notification when you just have slide to mark as read mails, and when you do it again, it really do mark as unread, so you have to do that 3 times (since old versions).