I was hesitant on getting the intel iMac knowing the introduction of the new ARM CPU. I still placed the order last week but today I decided to cancel it and wait! My current iMac is a late 2013 21.5 loaded. As you can see like most of us we keep our machines for years. I have had mine almost 7 years and not one issue. I would've hated to get the new 27" with the intel only for apple to cut support in 3-5 years!
Now the waiting begins!