I did consider myself to have a pretty good knowledge of early nineties onwards, but there have been huge swathes of information learned over the past three and a half years.
I now know a lot more about the early years, a lot more about specific brands and I can bore the best of them with my knowledge of Shimano M numbers.
Through the Retrobike rides I've also made some great friends, discovered some great areas to ride and re-established how much fun old bikes can be.
Plenty more to learn and it's all good.