For a few items, sure. But even I, a rabid introvert, will seek out a cashier for my weekly shopping. To say hello and goodbye. You all forget to be human beings. Stop making being InTrOvErT yet another singular form of personal identity.
I describe myself as a introvert too and never felt the need to make small talk with people I don't know. Even if I haven't talked to anyone in weeks. Does this make me non-human?
So you think going out once a week to say hi and bye to someone you don't know determines your level of humanity, and if you don't want that you're antisocial?
Hey. You are the one reducing what I'm saying as a sweeping all encompassing statement about someone's humanity.
I'm saying that not being bothered to say hi and bye doesn't make you an introvert. An introvert is someone being comfortable with his inner self and preferring deeper contact with few than being a beacon of energy in a crowd.
If you can't be bothered saying hi to a stranger, of course you are still human. It's just not necessarily a trait of an introvert. Its Part of another character trait or the state of mind you're in.
I'm a massive introvert, yet outside of IKEA I avoid self checkout like the plague. (Okay, I'll do self checkout if I'm just buying a snack and a drink or something) I just find that saying "Hello" and "Bye" to a cashier is much less bothersome than the potential of needing help when the SCO eventually breaks.
For a big trip, you're not supposed to use SCO anyways. They are normally for 10 items or less. Yet, I still see asshats with a full shopping cart or sometime two of them go through SCO.
Store near me has unlimited self checkout, "express" self checkout which is for a few items, and "shop and scan", which is a payment terminal for if you scanned the items with your phone while shopping.