No matter what our area of expertise, there's always something new to learn.
Now this is so true. I have been in this hobby nearly 50 years 
now as I got started at a very young age. I have seen a lot of things come and go and over this entire time I have been learning, and I still am, and will until I go to the flying field in the sky! Heck even now I find myself asking what I feel is a stupid question, but, if you want an answer then you have to ask the question. I am thankful that those of you who come to this forum take the time to keep answering the same questions over and over again. Have a happy new year!