For road racing there is no point in scandium anymore, carbon frames are made lighter, stiffer and more comfortable. The Scott Scandium from 2000 was below 1kg, the Scott CR1 from 2006 was even lighter in carbon, and more comfortable.
For tourists using road bikes, most people who pay for a highend bicycle will also have that be seen, with carbon, just like the professionals. There is no demand anymore for highend aluminium/scandium frames.
Then the really light scandium frames were well know for cracking, like the Scott Scandium. They were made to be raced and used for a few seasons. I doubt many have survived. I would love to have a bicycle like that, I think the Scott Scandium is beautiful, but I also know I will probably not like it much for riding.