I like the adage about working out: for every day you take off you fall behind a day. So 2 weeks off = 2 weeks of practice to recover the same place you were before the time off. In my case two giant times off are measured in decades. But now that I'm retired, and 6 years recovered, I am practicing more consistently than I did when I was a teenager. And I can tell it is helping. But, I doubt I will ever be as good as I think I was back in the day.