A DCT and regular auto will decide at what rate it will wear, determining when it's worn out. A manual transmission will respond to the abilities of the driver and the clutch linings and synchromesh will not wear out in the lifetime of the vehicle, if the driver is skilled. Yet another reason to prefer "obsolete" manuals, if you keep a car 100K+ miles. I've run cars to over 250K miles on the original clutch and when tearing them down, the linings were still in spec.
Very true. I have never burned out the clutch in a manual transmission. I have a 1992 Isuzu Impulse with 300k original miles. I took the oem clutch up to 270k miles. Never had a problem, the car pulled strong. Let a relative borrow the car for 2 weeks and suddenly it needed a clutch job.
My dad's (now my) 1994 Geo Metro XFi clutch lasted 200k miles (now has 300k, and sits in my car collection) while we drove it. Let another relative borrow it and it took a couple months and it suddenly needed a clutch.
Talk to other friends and relatives throughout the years who drive clutches on many other vehicles, and they talk about clutch replacement as if it's routine. I can't help but believe in the far back of my mind that the driver might be burning out the clutch with unnecessary wear. Talk to clutch burners and they rarely ever admit that their poor shifting habits are prematurely wearing clutches out.
Hypothetically, the computer and automated clutch control SHOULD outperform most humans. I agree with you while also not disagreeing with the idea that the automated clutches can be an improvement as well.
Basically, the automated clutch offers more precise control of the clutch therefore meaning longer clutch life. In reality, the automated clutch technology has yet to PROVE that, particularly when compared to drivers who drive hundreds of thousands of miles without ever having burned a clutch out.