Reddit top voted comments...
The idea of a telephone number being tied to a place, rather than a person.
It used to be, "Call the office, leave a message on the machine", or "call the break room, someone will answer". Now it's mostly just "call or text me" and I'll get the message wherever I am.
"You have a collect call from HI MUM IT'S ME I'LL BE OVER IN 2 HOURS, HANG UP SO YOU DON'T GET CHARGED, if you would like to accept these charges, please press 1"
Repair shops. There used to be TV repair shops, vacuum cleaner repair shops, shoe repair shops. Things would break and then you would take them to a shop, or even go and buy a part, and fix them. Now everyone just buys a new whatever.
Nobody I know ever mentions getting lost anymore. Even idiots that used to get lost everyday. Having GPS on everyone's phone has made asking for directions a thing of the past in 99% of situations.
my great grandfather, who I had the pleasure of knowing until I was 18 had some insight when I asked what invention had the most impact on him. He was nearly 90 years old at the time and his response still intrigues me to this day. He said that screens in his windows to protect him from the bugs at night changed his life more than anything else. He grew up on a farm in the thumb of Michigan, and getting eaten alive by mosquitoes at night was awful.
I asked him why his response wasn't the use of the telephone, TV, or even the radio. His response was "all of those things involve other people. Screens directly effected whether or not I could sleep."
I used to always be planning my social calendar several days ahead. If I was meeting a friend or girlfriend it always had to be at an appointed landmark, so you wouldn't miss each other. Everything now seems spur of the moment. It's a lot more flaky with people deciding in the moment what's their best option for a good time.
Hardly anybody claims to have met space aliens...they no longer have any excuse for not having pictures.