I was nearly a year overdue on upgrading from the old 6+, and it was fuuuucked up. Horrible battery and iOS update crippled it very similar to what Nate described above.
So now I’m posting from my 8+. I have 14 days to switch to X if I really want but I doubt I will. I’m used to this screen and general design and will probably have it through 2021. Or until Apple cripples it on purpose.