It was his memo that lead to reshaping Microsoft's direction with Windows and the internet with the inclusion of TCP/IP in Windows 95.
Allard went on to be a key member of the original Xbox launch team and Xbox Live. Unfortunately a lot of what he worked on post-Xbox was not as successful and he left Microsoft around a decade ago.
Since then he hasn't been involved in much of note, or at least nothing to the same scale and impact as his earlier work. Although topping his internet memo and the launch of Xbox and Xbox Live is pretty hard to do to be fair :)
https://hardcoresoftware.learningbyshipping.com/p/026-blue-s...
https://hardcoresoftware.learningbyshipping.com/p/029-tellin...
I rarely used floppies, we did most trading via BBSs or even direct dial. Telix was in my autoexec I used it so much.