It is subjective, I agree.
The same as spending money on anything.
Buying clothes, consumer goods in general, mobile phone deals, house....
We cecide whether we want to spend a given amount of money and are we happy to do so for the returns?
I loved my 4/4 but traded up to the plus8 knowing full well that running costs would go up but went ahead as I felt they were not that much more. The added cost of purchase made me think more, but when weighed up I was ok with it.
