The Apple brand has always sold through its brand loyalty - its not 'these days', it's since Steve Jobs and Steve Wozniak decided to create an affordable home computer. You seem as sucked in as those that renew their device every year - believing as much anti-hype as they believe in the hype.
Staggered brand loyalty. You have a customer with an 8 year old laptop that has served them well - they're going to buy that brand again. Multiply that worldwide and it's not customers just upgrading annually, it's all sorts of time periods. The sheer volume means they'll be having those that...