Its a steady build up of mud on the roads really.
And in all honesty anyone, no matter how often they drove, would be "thick" to get in the car and expect the same grip they had the previous time out wouldn't they? Daily driver or otherwise..

 

Depends on the time of year.
Not if it was hot dry day in July following 10 previous hot July days here. You would expect the same levels of grip, notwithstanding one-off risks.
Northern people please note - this is NOT a fairy tale down here
I think it's the seasonal changes that used to be more noticeable.
In recent years, the change from Winter>Spring>Summer>Autumn is much harder to pinpoint.
I think most people agree that below a certain temperature, coupled with tread depth, S02s lose their 'stickiness'.
So one degree above that point - things feel normal.
The following day, roads are one degree cooler - not enough to notice in air temperature but enough to put you backwards through a hedge.

 

Yup, fair enough. I'd still rather test the grip on the way out than assume it was the same as prev time out, whatever time of year, YMMV.
Maybe it's cos I don't use rubbish SO2s though!

Why do I get the distinct impression this thread is tempting fate now?! Reminds me, must check my tyre pressures, thanks...