Two things. First, priority access might be a more a curse than a blessing after a few updates that change things for the worse. (See all the bitching during the initial V8 to V9 rollout). You might not want it once it breaks a feature you really really like.This deal is just getting worse all the time. What's up with that?
Second, before you freak out too much, remember back in 2012 the internet access and map updates and all the tech package stuff was only supposed to be for a few years and they ended up grandfathering the older cars for life. So just because they say 2020 cutoff now, doesn't mean it will stick.