Calculators. Alright, probably not a luxury item price-wise these days, but I remember when math was either in your head, with pencil or paper, or for the really high level people, sliderules and log tables. Young’uns these days just don’t appreciate what a change that was.
**Cellphones. ** In a sense, phones in general, but it used to be that phones were either tied to a physical line and lived in your house on a wall or table, or “mobile” phones required a golf cart or a porter to haul around the battery/power source and antenna. Some dinky thing I slip into a pocket or clip to my belt that goes everywhere with me, has enough power to last a couple days if I’m frugal with use, and allows me to call for help or keep in touch from almost anywhere I am likely to be in may daily life, or while traveling, is amazing. At least to me. I still marvel over it.
Fresh food year round. People didn’t use to get scurvy in the spring because they were ignorant of the need for fresh food, they just didn’t have fresh food available. My parents remember those days, when only the wealthiest had fresh fruits and vegetables in late winter. I can walk into my local store and get fresh food any time I want, from all over the world. I regularly eat food my parents never heard of when they were young.
ATMs/debit cards/24-7 bank branches/on-line banking. I remember when banking hours were limited, where sometimes you had to take time off work to go to the bank, or do it on your lunch hour. I remember when you had to deposit a physical paycheck and lines at the bank on Fridays were long because of it. I can now get my money 24/7, make deposits any day of the week at hours convenient to me, and even do many banking functions sitting in my bedroom in my underwear at home. This was not possible when I was 20. Back then, banking was often inconvenient.
The internet. Let’s see - I can do research (again, in my underwear in my bedroom) any time instead of scheduling time to go to a library for it. I can communicate in real time with people everywhere in the world (well, everywhere that’s connected) without spending an arm and a leg in phone charges. I can shop on line, sell on line, read on line, listen to music on line, look at pictures on line. I can send photos and recordings to friends and loved ones. If it’s 2 am and I can’t sleep I can join a discussion somewhere instead of stewing in a dark, quiet house. I can catch up with the news. I can read/listen to stuff in foreign languages as easily as I can in English, without having to go through the headache of special ordering items. I can watch movies, play games, work on projects with other people. People have become so… so… oblivious to what an amazing thing this is!
Anyhow, can probably think of others, that’s just off the top of my head.