Rich
Paragraph 4: It used to be the case that people upgraded their PCs every two years or so...
What! You Londoners are so rich.
Most people renew their PC every 6 years, after Windows has slowly strangled it by installing oceans of unwanted guff, killing performance so much the hapless user can hardly log in anymore. The simple solution of reinstalling Windows from disk is no longer possible for home users. They must take the PC to the shop for a "clean up", or buy a new one. Most buy a new one, not wanting to share their pr*n collection with the local laddo.