if you just care about having the most perfectly maintained, bug-free system then yes, poor backwards compatibility is a good thing, but if you are talking abou

if you just care about having the most perfectly maintained, bug-free system then yes, poor backwards compatibility is a good thing, but if you are talking about market share and general acceptance of a system (which he is addressing in the video) then backwards compatibility is a pretty significant selling point for much of the general population.