This show from the late 70s was so ahead of its time, it's amazing! It would be a complete success if we would rewrite it to fit the present times.
If we're to make it more modern it's a question of HOW, really. Should we keep it the way it was, about the wild, wild west or should we write it completely diffrent so that it's just based on "How the west was won"?
Myself, i think it would have a break-through either way.
Actually, if we find new people that can play the characters just like the old ones could, we're saved. It's definetly worth a try!