If memory serves, it was Visual InterDev that won, actually. The VID IDE was the forerunner to Visual Studio.NET 2002, which was the first unified Visual Studio IDE.
n.b. I worked on the Visual Studio Core team, which maintained devenv.exe, among other things, from 2003-2007'ish.
n.b. I worked on the Visual Studio Core team, which maintained devenv.exe, among other things, from 2003-2007'ish.