Each different sensor & internal processor requires slightly different
instruction set so you get every camera has a different RAW file. This
is a problem as some manufaturers are excluding older cameras from
their RAW editors, thus making those cameras totally obsolete but
unuseable too.. There is a movement to get RAW processors using a
universal file typeto process. So far Leica and Hasselblad are
accepting the Adobe standard. Other camera makers continue to redo
their RAW instruction set with each camera.

Tom