Ten years sounds very short to me...
It's very short to everyone. But, it's the reality. If you don't use the door excessively, they can go much longer.
You can buy a real wood door, with commercial track, hardware, and springs. Which, with some paint and minor maintenance, will duplicate your 50 year result.
But, it will cost you lets say more than $5000.
In the same 50 years, you could have a decent steel door, replaced the springs, tuned it up, replaced the door, replaced the springs, and tuned it up, for lets say $3800. And you would never have had to paint either of them. The steel doors are also insulated.
That's why, except for high end homes, where the look is desired, wood doors have pretty much become extinct.
On those high end homes, the doors are generally stained, and varnished, which is a lot of maintenance. But, I guess if your paying someone else to do it you don't mind as much.