Actually, I care more about security than most people here. The OS still gets security patches up to date, and as far as I know there are no outstanding issues

Actually, I care more about security than most people here. The OS still gets security patches up to date, and as far as I know there are no outstanding issues in the firmware at the hardware level. If there were, it would likely take a state actor or someone with expertise to target me, and I just don't consider that to be that likely. At the moment, a 6t with Lineage is better than the latest Android on a newer device IMO, because of the control it provides. Eventually, I'll switch to something like PostmarketOS, or maybe a Librem or other Linux phone. For the moment, from a practical perspective, balancing price, performance, control, freedom and security, I don't think the 6t and lineageOS can be beat.