Re: Where is the problem?
Thing is, with the 6S and 7 you were ameliorating a £400 - £500 (or so) investment over (say) three years. Sticking to the same plan you are now looking at £1,000+ over the same period. How much you consider that to be 'value' is up to you...
Now you don't have much choice in Apple Land but in Android Land you can still get a £200 phone with manh/most of the whizz-bang features of these £1,000 monsters and it is still capable of 2 or 3 years use. My sub-£150 phone is now nearing six years...
M.