The old URL will continue to work for a long, long time, but will eventually just redirect you.
About the author.
In 2000 I co-founded Fog Creek Software, where we created lots of cool things like the FogBugz bug tracker, Trello, and Glitch. I also worked with Jeff Atwood to create Stack Overflow and served as CEO of Stack Overflow from 2010-2019.
Today I serve as the chairman of the board for Stack Overflow, Glitch, and HASH.