This is an interesting review of #GrapheneOS

https://lwn.net/SubscriberLink/1030004/898017c7953c0946/

Essentially, the reviewer says that it's great. But modern life pretty much requires proprietary software, which weakens the system.

For me, I'm willing to put up with the tradeoffs. So, for example, I use a bunch of Google Apps. But I'm doing so knowing that overall I'm in a better position than if I was using stock #Android.