How long? It's not based on time, it's based on the difference in skills. The higher handling/driving is compared to other perimeter skills, the more elastic effect those other perimeter skills will have. And once you start training, for example outside defense, the effect will get lower with each training session for that outside defense, but not for other perimeter skills.
All-in aficionado. Professional tanker. Trophy collector. Played box defenses before it was cool.