Q:

Congratulations, Bill!

Only a short while after returning, he has broken the 100k!
Thanks for your answers, and congratulations, Bill!

A:

After having been away for a year, and upon return, to work this hard on answering questions means there can be one and only one possible answer to this question:
Bill Dubuque is a unique individual who is a truly dedicated mathematics educator. 
Thank you for all your hard work.

