I don't have anything to do with GrapheneOS (only using it on a phone), but the security of Fairphone is not great, like many other Android phones it does not have a separate secure enclave to store secrets, but instead relies on a TrustZone-based TEE, which is often vulnerable to side-channel attacks (e.g. see the recent attack where a lot of MediaTek phones could be decrypted in seconds, even in BFU). Note: iPhone has had a secure enclave since iPhone 5s (2013), Pixel since 3 (Titan M, 2018), and Samsung flagships since S21 (I think? Knox Vault, 2021).

They also do firmware updates very irregularly even though Qualcomm does monthly bulletins and Fairphone's firmware is known to be full of CVEs. They also have a bad history of updating Linux kernels, e.g. Fairphone 4 is on an ancient Linux kernel. Fairphones also miss modern security mitigation techniques like MTE.

To be fair, this applies to many Android phones outside Google Pixel and Samsung flagships.

Aside from that, repairability is nice, but the most common early failures on the Fairphone 6 seem to be broken volume buttons, for which Fairphone does not offer a replacement and an issue where the logic board dies during charging, which is also not user-replaceable.

---

Ps. perhaps you could use substantive arguments the next time? E.g. which points of the GrapheneOS lists of requirements do you think are irrelevant and why are they irrelevant?