Re: NEVER put your home address in your GPS!
"Do you not know where you live?"
Yeah, I do. But having an ETA, getting out of the town or city I'm currently by the quickest route, avoiding delays that I otherwise don't know about etc. are useful functions. Likewise, getting to places I've never been top before. Pre-SatNav I had a couple of road atlases and numerous town and city maps totalling something like £75, which needed updating at least every few years and, as is well known with paper maps, are at least a year out of date when first printed. A £200 SatNav with lifetime map updates is cheaper and more likely to be up to date.You may have a different use case, or be happy to delay your travel while you stop and ask directions, or be happy to be delayed by taking the wrong turning or getting stuck in a queue, but some us would rather just get where we want to be.
I will add that for a short while between relying on published maps and buying a SatNav, I did use multimap.co.uk for a while, screen grabbing and printing relevant maps at relevant scales to get where I wanted to go. But doing that every night ready for the next day is a bit of a chore when I can put a post code and a door number into a satNav and have to do all the heavy lifting more me. It's kind of the raison d'etre of computers. Making life easier for the user.