Long Post Warning
It's a marketing strategy. If you think about it.
Ford, Chevy, & Dodge manufacture their (modern day) cars to last about 100-150,000 miles. After that they begin to break down. You have to start buying parts and getting it serviced. There is only so much of that you can do before it really starts to get old. That's the reason why so many american cars are made of plastic interiors. It's cheap and easy to get, no to mention it can be recycled. Plus since the car has to meet new safety requirements, it technically has to be made of plastic so all the energy from a crash gets expended and crumples; saving you from the drunk driver last night.
Apple has made how many iPads?! One or two is enough.
Instead they released the first with one processor, and fair graphics. Then they release a second one with the SAME graphics just more processors. Finally a third one hit the market with HD graphics and even more power. What's wrong with just two? What happens to the old ones? Well they end up on eBay and craigslist (or in closet or landfill) because all the the Apple wh**es just HAVE TO HAVE the new one. Besides Apple buys parts from Samsung and other people anyway. So it's not really all Apple.
Sony had to go the safe route in order to sell the console WORLD WIDE, so they had to use cheaper safe stuff, which is a plus for them, to mass produce the product. They map out a plan, make a few million of these models, a little of these and slap a big price tag on it, then in two years make a better one. Mass produced stuff is usually made of cheaper stuff, otherwise it would cost company way to much to even make it. So in about 3 years your beloved PS3 will start to break down and you'll have to service it yourself or buy a new one. Paying $150 for Sony to fix their product that could have been made much better is not worth it. I don't want to sink even more money into it.
So it's best to buy a compatible Portable HDD or SSD and perform a backup once a week. Buy a USB Drive and backup save data EVERY-TIME you are done with your game. And take the time to open it up and clean it out. I voided my warranty a month after just buying one. That thing was loaded with dust and cat hair. It's like a vacuum. Its internal temp dropped after that. Anything electric is a dust magnet due to static.
Oh, here is a good tip. When a disc gets stuck in the older model (fat) PS3, there is method to remove the stuck disc by force.
Flip the power switch on the back to OFF. Place your finger on the Eject button and keep it there. Flip the power switch to ON. The fan will turn on and max its RPM speed. Now watch that pound of dust fly out.
The downside is you have to continue the eject process. So once the fan kicks on, repeatedly tap the eject button until the disc comes out. the console will remain on for a few seconds then turn on off with 3 beeps. Only do this when the console is cool. The fan itself generates a good bit of heat at full speed and your console will vibrate a good bit. Don't freak out.