They are not much more than buzzwords, and I did my research. Nothing is "dealbreaker" about not using Pixel/Graphene, and it is perfectly okay to use other Androids with plenty security. They sell snake oil dreams and pretend theirs is the only solution, and that sounds dishonest. Not to mention, them lying in YouTube comment sections on how they bought $1M Israeli Cellebrite kits and Pixel/Graphene combo is immune to bootloader attacks.
I do not see the developer and his internet minions lying as a source of increasing trustworthiness in the project, not to mention their FUD and dogma dissemination cultist tactics that fool privacy seekers. They are not keen on improving or teaching security, but in fooling and scaring people for personal benefits.