I don't know, but I believe the reason iPhones get dropped from support is not calendar years, but rather architectural change. That is, the 32 bit to 64 bit tr

I don't know, but I believe the reason iPhones get dropped from support is not calendar years, but rather architectural change. That is, the 32 bit to 64 bit transition dropped the old 32 bit phones after a while. So unless there is a major architectural shift I don't see why they would drop the 6s and SE.