GrapheneOS on pixel 6 pro?

I actually have two questions, first, should I switch to GOS even though they don't really recommend it on their website and might be left behind soon?

Second, should I install the new March android update? I don't use any of these features that are listed, and some dont even work for pixels older than 8. My worry is that the phone will just get slower and drain battery faster. But on the other hand I probably need to update this to receive other security updates later this year before the 5y period of support runs out.

Also I'm not looking to replace my phone. This is still an amazing and fast device with camera better than 90% of phones out now.

Thanks for the advice!