Design changes, like 10-15" roadways and better sub-road construction, have improved durability, but older roads were not built in the same manner so they suffer from failure now years down the line.
One of the most important pieces of equipment for road construction, IMO.
They’re rebuilding the 5 through town here and use those things. They are also laying down asphalt as a base and then concrete with rebar on top of that. It’s taking forever but may be worth it.