Wolf, I get your point about attracting new players, but there is a huge audience who are more interested in gameplay than graphics and are happy to forgive gfx if it's fun to play. I played trough the whole of deus ex 1 the other week and those graphics are awful in comparison to today's standards, but that game is truly a masterpiece. Look at how many people play RA1 still on cncnet, I know RTS games are different, in that gfx aren't as important but still, 300+ people online. A game that's almost 20 years old.
I've just started learning W3D and for whatever weird reason, I love it and i wouldn't swap to UDK now even if it is easier.