I imagine its possible that a newer compression system could better choose what data was eliminated (while using the same compression format) based on a better understanding of how a human would perceive the outcome. Clearly, if this was the idea behind new compression settings, it did not work at the bit-rates the BBC tried. Not all compression systems (even ones that use the same format of compression) are created equal.
OK, so the definition of "modem" changed. Now, its a piece of networking equipment that bridges the greater internet to your home network over some form or existing infrastructure. Our field is young enough that the definition of certain things is hardly static.
I spent a few weeks working for them at one of their warehouses. In the employee manual there were dates for Christmas, and Christmas Eve. The dates were the 25 and 26 respectively. If they can't even get the dates for Christmas right at a text book publisher, I don't want to know what else they fail at.