Hi
I was more interested in whether it would be theoretically possible to find some such upgrade techniques than whether marketing reasons or economics would make it really happen, and I didn’t make that clear.
Well insert your own answer to your question, it isn't going to happen so what ever you decide is theoretical or not hardly matters :-) In theory, most theories turn out to be incorrect, which in theory should have been correct.
One real-world example where this did happen - when Microsoft released windows Vista, they used some of the good techniques involved in IPv6 in IPv4 too, I read a detailed description of it in a book published by Microsoft about their implementation of IPv6. The IPv6 source selection algorithm is one example iirc.
Just not relevant. You are taking something some company has done years ago that sort of fits the same principle of what you are asking, then trying to apply that to something completely different.
Besides you need both ends to support any changes, you can't just shout a different language and expect everything to understand.
Okay for sake of any further arguments, lets say theoretically yes, quite possible, in theory, maybe, it could be done. Next....
Regards
Phil