Solution pack / Integration studio - why are there versions?

By J. on 19 Jun 2013
I somehow understand why there are differences in service-studio 7.X en 8.X
But what I don;t understand why we should have multipole versions of the solution-pack and the integration studio.
the development of those are done in the 4.x or before and hasn't changed since.

please make those two at least doenwards compatible so it doesn't matter what sort of osp you open and based on the targeted server it does it so.

Tmlewin .20 Jun 2013
I totally agree with you , there really has been no change in integration studio so why is there any need for an upgraded version to be installed instead of being backward compatible.any thoughts .