I've made my feelings about WhatsApp better known elsewhere in this thread but thanks for all the detail about iPhones - it's really useful.
That's another consideration. (The Mac, not the iPad) At some point in the not-too-distant future I'll have to upgrade my hardware if I want to continue using banking stuff etc and switching to a Mac could be the way to go to solve both issues.
But, with the exception of the state-of-the-art 386DX I once had built for me at an extortionate cost, I've tended to buy new, cheaper, lower spec machines because I just don't need massive capability for the things that I do. Buying a new Mac at an eye-watering price is really not for me but I suppose the trick is to know how old is too old with those machines and buy one which will still function properly for a while and still get essential updates etc.
Thanks
Nick