I think the most I've ever baked at once is a double batch of anything. Cookies take a LONG time, as you are obviously aware from your marathon snicker doodle episode. I just don't have it in me to spend that long at it. Plus, I don't know if I could mix that much dough up at once!!! Did you use a giant bowl and mix it all at once or mix separate batches.
I always make a variety of cookies at Christmas time and I used to do marathon baking days, making several varieties on a couple of different days. I always ended up not enjoying the process and often the cookies weren't as good as they could have been. So now I start early enough so that I can make a single type of cookie on any one baking day (double batches are my limit there) and put them into the freezer. Since no type is ever in the freezer for more than a month they are all still very tasty. (...and now I have a craving for chocolate chip espresso short bread cookies...a new recipe from last year!)
As much as I love to bake I just can't stay at it all day. I have a great respect for people who can bake for a living...especially, for some reason, people who turn out a number of pies every day. I know they have likely larger kitchens that I do, and possibly more equipment, but multiple pies in one days seems daunting to me!