thinking about paying $500 for a pixel 6 to nuke it and install either lineage or graphene. Main reasons: security, I want to degoogle, hate bloatware, I want complete freedom to choose what apps I want on my device, smartphones are notoriously known for their short support cycles (to me 4 years is not enough).
what I don’t know is why graphene developers have chosen proprietary hardware from what has to be one of the most foss unfriendly companies
GrapheneOS is great on my Pixel 7! App load times are slower, but that is a function of its hardened security.
To answer your question, Pixels are one of the few devices that allow relocking the bootloader on non-stock software. That in addition to the fact that they have some of the best security of all smartphones.