I assume that the new Hammer can be used to edit HL1 maps. So does it naturally follow that people can uninstall their older versions of Hammer once Source is released?
I despise redundancy.
P.S. Of course, I'm keeping my HL1 installation so I can still play HL1 maps when I feel like it. I still have the original Wolfenstein 3D installed on my laptop when I want some retro action.