If anyone still wonders if they should buy #OnePlus: No. You should not.
They've now put a hardware-based anti-rollback feature in place that, if you try to roll back (f.e. to install a custom ROM without Google spyware or because of some other issue) your device will be hard bricked, irreparably.
https://consumerrights.wiki/w/Oneplus_phone_update_introduces_hardware_anti-rollback
They're worsening for years now, this is just the newest addition of crap they pull.
#enshittification