A cartography professor of mine once advised me to take another career path because cartography was dying; he added, “Google Maps has terrible maps- but no one seems to care.” It heartens me to see in HN comments that some are noticing.
A pet peeve of mine is when water bodies go unlabeled.
An old-fashioned paper map like the kind inserted in National Geographic mags when I was wee included a breathtaking amount of information, but that requires careful design so element labels don’t overlap etc.