knock
Bluelighter
Not everyone has a spare £100 or whatever it is. Also the hardware requirements of newer Windows exceed the specifications of many PCs and laptops in current service which are quite capable of providing good performance for the tasks people demand of their computers for as long as that hardware continues to function. People don't want to just throw away perfectly serviceable hardware that they've grown accustomed to using.
That's why "just upgrade" is not necessarily a satisfactory answer.
That's why "just upgrade" is not necessarily a satisfactory answer.