Even than, I doubt that it would be helpful, since still so many C extensions are just not available in Python 3. I also don't think that it is a problem of apathy, but of wrong initial planning. With better initial compatibility, a bigger momentum could be reached. Now the decisive point is over and we will have to live long with both versions around (even when Guido sets a date).

Only thing that could really help, I think, would be a really big improvement in Python 3 that makes it more attractive to move, but that could also widen the gap between the two.