It became commonplace in the past few year to declare the mileage run dead. And for the most part, the traditional mileage run has been dead for a long time. A combination of rising airfares and rising award prices meant that it no longer made sense to fly for the redeemable miles earned.
It didn’t used to be that way. Double, triple, and even quadruple miles offers abounded a dozen years ago. Airfares were low, $200 cross country roundtrips were common or even $500 roundtrips between the US and Southeast Asia (upgradable even).
I once cleared about 100,000 redeemable miles on a single roundtrip, and back then United’s business class awards between the US and Australia were 90,000 miles roundtrip. Sure, the opportunity cost of my time was lower back then. And there was no inflight internet. But I curled up with a good book.