When did you 'know' your generation was done? Was it hearing kids saying something that you had no idea about? Tech/apps etc...

I’m 45 and was with a friend who is 87 last night. We parked the car and had to pay the meter. The meter battery was dead (Town, get your shit together.) but you aren’t off the hook for paying - you must use the app. My friend (who is Greek) is trying to get me to take her quarters for the meter but I’m explaining that I couldn’t even if I wanted to bc I have to use the app. She says I can use her card, but I again say I have to use the app. She waves her hand as of shooing away and says “That is beyond me, do what you have to do. I don’t know anything about that.” “It’s okay”. I say “You don’t have to know.” “You’re right, I don’t have to know because I don’t drive anymore.”