GraphineOsEnjoyor I think part of the problem is the way the community sells each other on the purpose of profiles. They talk about it as a way to separate yourself from the Google ecosystem, but that doesn't seem to be what happens in practice.
Installing Google apps on a device is not really consistent with separation from the Google ecosystem. Any data provided to a Google app (including location data) is potentially available to Google.
GraphineOsEnjoyor The apps are still installed at a global level and seem to be running to some degree at a global level too.
Apps in a profile are not running if the profile is suspended (press and hold the power button, choose "End Session").
GraphineOsEnjoyor I assume that means apps like Google Maps still has its tendrils in your phone even if you have it installed somewhere else, right?
If Maps is installed on the phone then I guess it has "tendrils", though I'm not sure exactly what is meant by that. In theory there are ways that Maps in one profile might determine it's running on the same device as some other Google app in a different profile -- but it's not clear in practice that Google works as hard as other companies to deanonymize Android users (example).
In some circumstances using user profiles can compartmentalize data to some extent. But installing Google apps and providing them with data will inherently provide Google with data, and user profiles don't change that.