I suppose what makes me feel old (seventies child) is periodically having to explain the world before technology to younger people and watch their expression go through surprised to astounded to horrified.
I had to explain the other day that we once had the choice of a cream or a grey phone (rotary dial!) and they only had the grey model. Then came the trimphone, but there was a two year wait. And my mum wouldn't let anyone use the phone ever, because we couldn't afford to pay for actual calls. I do the mobile phone size graphic in some presentations to illustrate change, I suspect revealing the pre-mobile era would be too much for anyone under the age of 20. God knows, it's hard enough to get them look up from their phones for more than a few seconds.
I confess, I have no idea what people did before the internet. My grandad used to dig coal out of the ground* apparently. Seems implausible now.
*or did until the mine roof fell on his head and broke his back, after which he became a bin man, which doesn't make much sense.