That's like saying "I don't use wheels, because I don't live in the prehistoric era when they were invented."
Some tools are fundamental. A tool to solve the problem of executing dependant tasks is one of them.
Solutions to these fundamental problems tend to be implemented early on. Some of those early solutions were poor, and have fallen out of use. Some of them were good, and have been refined in the intervening years, and hence are still with us.
A good tool to solve a fundamental problem is still useful, no matter how old it is.
Some tools are fundamental. A tool to solve the problem of executing dependant tasks is one of them.
Solutions to these fundamental problems tend to be implemented early on. Some of those early solutions were poor, and have fallen out of use. Some of them were good, and have been refined in the intervening years, and hence are still with us.
A good tool to solve a fundamental problem is still useful, no matter how old it is.