I thought the Korg PA-800 was plastic, and I know the Tyros3 is plastic, and yet they seem to hold up remarkably well.

So, an S900 is going to do the same.

I doubt very much if metal will continue.

Plastic composites, and even carbon fiber, are slowly taking their place and giving strength and lightness...and they are much more renewable and environmentally friendly

Buying a G-70 for portability is like downloading porn to savor the cinematography.

Common misconception...size and weight equal quality and performance. Don't be fooled.

Ian