To me temps legacy is substantial. In the early days they were one of many sites where you could go to get your game on. (your rom fix) Then over time as rom sites fell by the way side (taken down, cetc.) Temp became one of the only sites who were able to adapt and transform into something else that has actually been successful. All others who tried to change, after the roms went away, died because no one wanted to be there without the roms and those sites were unsuccessful in their transition approach.
When you no longer have anything to offer the masses, you can't survive. It's adapt or die.
The legacy? Simple. Adapt, resist and thrive.