@weltsnake Been using Graphene for about two months now and have never had any problem with speed on my 3a XL. I tested my phone's speed along with the video and mine was much more inline with the speed he demonstrated on Calyx despite me running Graphene. I'd go with Calyx for the increased application support due to MicroG, not for speed. To each their own though, that's all just my opinion.
@ThreeBadgersInATrenchcoat that’s great to hear! Techlore’s video kind of put me off regarding GrapheneOS but I guess it varies from user to user and also the higher end pixels should be able to run everything smoother