Worse is the other way around, but if you then speed because the system doesn’t work, it’s of course still your own fault.
I know why they want it and I mostly agree, but they’re massively downplaying the reliability concerns, saying it is “usually correct” (It’s not) and “data will improve”, conveniently ignoring that these underlying systems aren’t new and the data has consistently sucked over its entire lifetime. They don’t provide a target date by which they want this data to be available, so it will never be.
Anecdotally, on a 30km drive, my car (which receives updates to nav data over cellular) is wrong 5-10 times, in both directions.
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Using the google algorithm, which by design includes related results, is probably the worst way to “prove” anything.