'Upgrading' to skinny tyres pointless for London commuting

As for rolling resistance. Does anyone really give a shit? I have these tyres and not had a puncture in London for over a year now. Which should be the single most important factor when chosing tyres for a commute. Unless you like pissing around in the wind and rain with a puncture repair kit and tyre levers

^ This.
Commuting is about reliability.