Even if you turn off FSD beta it still uses vision only for AP and that was a deal breaker for me. It made my highway AP useless, I guess because of no radarSo what do you get by opting out? Why don't you just turn off FSD and use it as if it is on just normal AP and keep getting FSD updates when they come. When the public branch actually gets ahead of FSD again I would understand the argument better and if there's a killer feature you want that you can't yet get with FSD then it makes more sense to me.
Vision only is just not good enough for high speed traffic. Also that 10.3.1? update fiasco was a scary experience for me and my family. I was driving on highway at 70+ with two little kids and AP just decided to slam on brakes twice with nobody around me.