What's the biggest draw of GrapheneOS apart from de-googling? Does it have a better battery life? And compliance with NFC payments?
Pixels provide strong hardware and firmware security. Pixels have made multiple significant hardware and firmware level improvements based on recommendations by GrapheneOS. GrapheneOS now has a hardware partnership with Motorola Mobility which includes working with Qualcomm. It isn't only a software project.
Regularly leaked data on the capabilities of Cellebrite show they have the least success with GrapheneOS by far despite specifically hiring for it based on their job postings.