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there's traffic however, I find I get annoyed at morons not knowing what NSL signs mean, that NSL still applies in the Hindhead tunnel and the speed limit doesn't magically drop to the random 60mph that so many people seem to think it does and just people generally being tools. I'll often accelerate a bit to get well past them, but I just find it more difficult to sit at 70 when the roads are busier.
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This, totally this! I find myself passing on the left those idiots who slow to 60 or less. Even had a bloody McLaren the other day doing bang on 60 thru there who had been happily tanking along in front at 80-90 a few minutes before the tunnel.
I find adaptive cruise has taken a lot of stress away from commute driving though.