In your part of the world, maybe. I live in the middle of the salt belt in the US and we get about 10 years out of most cars. That's when you start seeing rust holes in the fenders around the wheels, when most of the frame has flaked away and the floor pans become involuntary structural elements.
If you're a car nut who spends extra time and money on preventive maintenance and rustproofing, you can get a few more years. But the rust comes for your car at some point anyway.
Car manufacturers know how to make the frames and bodies last longer, this is not an unsolvable manufacturing and design challenge. It's just that nobody is getting a raise for going to their boss and saying, "I know how to make the company sell slightly fewer cars..."
Rustproofing is still a good treatment to get done to delay and minimize damage, but it's a thorough and slightly expensive job.
People who have a hobby car usually retire it in a garage from November to April-May instead.