Re: How much?!? Just get a OnePlus 3T
"Spending £800 on a phone is just lunacy."
No, it's lunacy to you. Other people's value criteria may be different - for example maybe image is important, or they want to be perceived as successful. Same reason why people buy crazy expensive watches, cars or jewellery - it's not because they tell the time better, get from A to B faster or are any more shiny, it's about the image it projects and the feeling ownership generates.
Doesn't make it right or wrong, it's just different for different people. And trying to project your own view of what 'value' is onto others is the height of arrogance.