The real-time traffic information is not real-time, so it doesn't compare. If a cabby comes up to a blocked street, they instantly know which route to take to get around it. Satnavs need time to calculate. The knowledge also improves the cabby's ability to determine the destination address, as such a fundamental understanding of the hotels, businesses, pubs, and former hotels, businesses, and pubs is amazingly useful when finding out where someone actually wants to go. Mumbling a bit of your address or using a long-closed pub as a route reference is something perfectly adequate for a Knowledge-equipped cabby, but nowhere near enough for a satnav. Seriously, these cabbies know London incredibly well, including how London used to be.
So no, London still needs black cabs and the Knowledge.
p.s. I'm very impressed you didn't slip in your usual hate-filled attack on over 1.6 billion people. You might just be growing up.
Or maybe it's because people like you think making massive generalizations of 51% of the population is perfectly acceptable. Hint: It's not. Not all women think the same, just as all men don't think the same. Old-fashioned, lazy thinking such as yours is the real danger, as it festers, builds up, and becomes something ridiculously toxic, where anyone speaking against it is labeled with whatever easy badge you can pin on them in order to simply ignore the reality that maybe you are an antisocial bigoted fuck...
Women trash talk just as much as guys and are (on average) no better or worse at it. Some will be worse at it, some will be better at it, just as with guys.
Grow up. The future implores you.
A bug in the hand is better than one as yet undetected.