I agree. Google and Waze have a massive advantage with a huge user base and agile crowdsourcing. Google owns both and who can compete with Google? Most OEM-based GPS systems source their maps from commercial map providers such as TomTom and Here. Huge difference. That's one of the reasons Google and Waze are generally considered the best nav apps and why we all should be using them rather than the OEM nav. If they ever add custom routing, which I believe they may, no other nav apps will be able to compete.
Auto manufacturers still offer built-in GPS systems as a carryover from years ago before smartphone nav apps became popular. It was nice to have the nav system built-in rather than having to mount a discreet GPS or a smartphone on your dash. Other than the convenience of an integrated system, there really isn't as much sense to get this option anymore because Andriod Auto and CarPlay now allow you to display and operate select smartphone apps on the vehicle's screen. Once wireless Andriod Auto and CarPlay become more available, there will be even less reason to get the OEM GPS option.
If auto manufacturers wanted to offer a competitive integrated GPS, they would use the
Android Automotive OS (not to be confused with Android Auto) for their Infotainment systems. This would give them the native ability to run smartphone apps without needing Andriod Auto or CarPlay and a smartphone connection. Stellantis is doing just that. UConnect 5 is built upon the Android Automotive OS rather than the bespoke style OS in previous versions. This is a huge step in the right direction.
For us UConnect 4 users, we should use Andriod Auto and CarPlay for nav even though you have to inconveniently plug in your smartphone. If you still want to use the integrated GPS, at least wait for the map updates to go on sale. Most updates only contain relatively minor changes such as corrections and newer roads. The previous map will still be mostly relevant. Perhaps just get every other update. $150 is too much to pay for minor changes every year. Use Andriod Auto/CarPlay along with compatible well-rated smartphone apps for any serious navigation.