That relates more to the public rhetoric surrounding Graphene than with how the OS itself operates imo. It's pretty practical and enables (or allows you to enable) everything that a typical Android does, except where Google Play Integrity checks fail, which is not in Graphene's control (e.g Google Wallet payments).

People bill it as making a ton of usability compromises in the name of security, but that doesn't match my experience. The only redeeming observation is that your phone _does_ lean towards secure-er and ungoogled defaults, which _does_ break functionality that a lot of people expect to "just work" OOTB. But it's trivial to restore it, and the upfront effort getting things to work is amortized over the lifetime of the device. It's maybe an hour's worth of work.

The counterfactual world where users need to forumcrawl how to get to secure/private defaults seems worse to me. By contrast, it's pretty easy to recognize when an app isn't working.