I guess the "big" question regarding the rollback ability, regardless of the product, is how far back should it go ? We can currently roll back as far as what, Q2.0 (I don't use the feature so I'm not sure last time I played with that knob lol) right ?
Well, lets say there is Q4.01 and then maybe Q4.1, Q4.2 and heck, maybe even Q5, or who the heck knows what it could be called..... Regardless, how far back should rollbacks allow ? When its Q4.2 does Q2.0 modeling still exist, or do we only go as far back as Q4.00 by that point ?
It seems that as we move forward, there is always going to be a point you can't go back to (short of reinstalling old FW, so while maybe some might want have a knob that can go back to FW18, or heck, FW9, the option just isn't there anymore). So, it sort of makes this "debate" seem a bit silly, in that someone might be arguing that they need the ability to go back to Q2.01 modeling for a given patch, but if/when they have upgraded to FW4.xx (hopefully for mkII users too!) that Q2.01 might be too old to even still be an option.
Then what ? Post waxing nostalgic about how sweet FW Q4.01 sounded because Q4.2 just sounds wrong somehow?
I think the pace of progress is simply inevitable, aside from choosing not to upgrade, because if a user always installs the latest FW, there is always going to be a point of no return. As such, the rollback feature is really just a short-term solution.
Again, FW10 had an option to have FW9 I recall, and probably some people thought that was cool at the time, but as of today does anyone want to go back to EITHER of those FW versions ?