Of course you can't have a memory slot. Apple make a lot of their money overcharging you for a bit of extra NAND. If you want more RAM, then you need to pay for the next capacity up.
And of course you can't have an extra port. Then Apple won't be able to sell you adaptors.
Still sticking with my 6S, with nice wired phones for my endless conf calls. If I had to go wireless I'd need two sets, because nothing has enough talk time to last me through a day.