I’ve discussed the PCs and laptops as my primary computing devices already. In addition, my wife and I use other devices that technically are computers. We each have a smartphone (same brand and model for minimizing confusion). In addition, I use an old iPad (2nd generation that is maxed out at IOS 9 latest and therefore cannot use the most recent IOS 12), and my wife uses an iPad Mini that just updated to IOS 12.
For years we resisted getting smart phones, because we did not feel the need to have the features they provide when we had two computers for those things. We had basic cellphones. When the batteries were near dead on those old phones, we finally succumbed to the new age and bought Samsung Galaxy 6 phones (not the most current at the time even), but their size was more appealing than the Galaxy 7.
My challenge is to be well enough versed in all the operating systems to do trouble-shooting when necessary.