So for all of you with older devices - do you update to the latest iOS? I have an 2016 IPP 9.7 that is working just fine on 12.1.1. No screen touch issues, no stuttering, no ASK problems, no Pencil problems. Currently, it works just like I expect it to. My concern is the many threads with complaints of the touch issues. I don’t have that issue currently and definitely don’t want to update if the touch issue is software related. Thoughts?