and why some changes would be unlikely to occur in anything but an alt.
I'd be happy to have this moved to a different board if appropriate.
I don't know, that would be up to a mod, but if it is a technical discussion that relates to Bitcoin, I'm not sure if it needs to be even if the majority of the end result only would be applicable to an alt coin. Once side chains are active it could be part of a side chain for example.