I used to upgrade iPad every year but have had an Air 2 for years now as it was the last to have the excellent leather smart case. - Apple you missed out on selling both iPads and cases because of the decision to discontinue them -
Unfortunately, I use my iPad for work (JeppFD-Pro, a secure document container plus some other specialist apps) and my Air 2 is a little short on storage and speed now. Have ordered the new 10.5 Pro. I am not looking forward to having no leather smart case. The back is going to need protection and even if they make a silicon one, I really don't like them.
I can't understand why they don't offer a leather case - all the effort that goes into designing the iPad and Apple don't think a decent case matters.