If I don't practice playing my guitar for a few months I feel very rusty. After a few years I'd almost be starting from scratch. As they say "practice makes perfect". It doesn't surprise me at all that drivers struggle with comebacks after long breaks like that, especially if they aren't driving similar cars on a regular basis during their break. They still have the basic skills and knowledge of how to drive fast, but it takes a lot of practice to get that last little bit out of the car and themselves, and that last little bit is what counts in F1.
Usually a driver is older than the average driver during a "comeback" too and age catches up with everyone eventually, and age also makes it harder to adapt and learn new things.
Edited by travbrad, 18 December 2015 - 15:31.