How often to metro exits change???
It may have only changed a few times over the last 2 years, but it's certainly a rude awakening when you're running to catch the train and you find out your stop is now a block away from where you thought it was.
0: https://www.transitchicago.com/redahead/
1: https://www.transitchicago.com/ctas-red-and-purple-moderniza...
I think this is probably a local issue: Google Maps is better in some places than others. Google has a huge office in Tokyo, in Shibuya overlooking Shibuya Crossing, so Tokyo is probably one of the best-supported cities in GMaps for this reason. Other cities might not have such accurate information.