I hadn't raced since 2009 and got my first license this year.
All my categories stayed the same, still a 3 on the road, 4 on the track and 4 in cyclocross. However, because I'd upgraded to Sport category in the old NORBA days I'm a Cat. 3 mountain biker. The trouble is, I've been absolutely smoked in every race (2) and group training races (about 4 of them) I've done. I would even argue that at this point it would be hard for me to hang in a 4/5s race.
It has been demoralizing and I've realized that my racing days are most likely over. Getting back up to race speed just doesn't seem worth it. It's all good, though, I'm also a much happier person than I was when I was racing. I still love riding!