Ride in an airplane, or in a satellite, and from this effect you will live longer—according to an Earth frame. But you will not experience more time. Time just runs slower when you are moving. Your clock runs slower, but so does your heartbeat and your thinking and your aging. So you won’t notice. That’s the amazing thing about relativity. It isn’t just clocks that run slower; it is everything. That’s why we say that it’s the pace of time that changes.
