I think that keyboard manufacturers are Conscious of the weight factor. That’s probably why the Tyros is the weight it is. Even workstations are looking at being lighter. The Roland Fantum x7 (76 keys) is 37LBS and the new Fusion 61 keys is supposed to be 30LBS.

That’s why I was surprised about the weight of the Roland G70.

To me the improvements I want are more software based so I don’t see why that should affect the weight.

It is not just the physical ability to carry the keyboard but to travel with it on a common carrier. And it just is not necessary to carry something heavy if it can be avoided.