Actually most satnavs are still remarkably unreliable
Last weekend, driving round Birmingham the satnav (recently updated by Honda) took us to a Tesco, which turned out to be the one that closed three years ago when my older child was living near there. And on the way home tried to take us off the M6, because the link to the M1 changed a while back and you now have to come off (left) instead of just carrying on until they merge. The last time that I went that route I didn't avoid it. I was in the wrong lane. But then the satnav couldn't work out how to get me back to a motorway, because it couldn't work out why I wasn't already on the Mway. It was an interesting country drive though.
They are also remarkably unhelpful if a junction has more exits than normal. "Turn Right" "Which fucking right, there are two of them". (These tend to be the junctions where looking very carefully at the map would help - mostly help you get killed by oncoming vehicles.).
Added to which, whatever setting you use they always seem to want you to drive/walk a significant distance out of your way to get to a major road that is three miles further away from where you want to be, and goes through the heaviest patch of traffic in the whole area.