Perhaps you don't.
My PC could be considered oh 15+ years old.
Well that's how old the lovely quality steel case is.
I've changed motherboards, CPU's, Graphics cards, Sound cards, Hard drives etc etc as I've needed to.
In effect my PC has been a 120Mhz Pentium, and it could be a 3.8Ghz i7 if I wanted.
There is no need to throw it all away and start again, that's the beauty of it.
Say you are waiting for Apple to implement USB3 but you can't have it as they don't fit it. Well I can go order a USB3 card on Monday, and by Tuesday evening I'll be running USB3.
In the same way, I may get a new game, and think ohh this is struggling, my graphics card is really not up to the job. I don't have to sell off my entire machine, I can just go and order a new graphics card.
Some Apple owners would dream of being able to upgrade an iMac like this but Apple don't allow it. Ok, some people do take them apart if they are brave and can upgrade soma parts of them.
You may be happy and content to allow Apple to make your choices for you and relieve you of having to think for yourself what you need.
Others love the flexibility a PC gives then and they would never give that up.
You may go to Disney land and enjoy the "experience" that been created for you the consumer, and be happy with that. Me I'd like to go, but I'd also want to look underground and see the tunnels the staff use and "Behind the scenes"
In a way I guess you could also liken it to a religion. Some people love to believe and follow a faith, there being an almighty up there and everything is neat and tidy, they read the stories and have a contented life, just accepting their faith.
Others cannot do this, need to ask questions, cannot just accept the stories and have a enquiring mind that is always looking, asking, and pondering things.
Neither side is wrong as such, deluded perhaps and prefers an easy and more cosy path through life.
Of course, either side probably cannot begin to understand why others can think any different to them.
I mean, how could anyone who believes in say millions of years of evolution even begin to understand how anyone, over the age about about 10 believe there is a man floating above us who created everything as is, in 7 days.
And no, I don't mean Steve Jobs