Sometimes, things in everyday life suddenly stop existing, and you barely notice it — and when you do realize they're gone, you're like, "Wait, whaaat?"

Redditor u/lukiiiiii recently asked the people of Reddit, "What quietly went away without anyone noticing?" The answers honestly blew my mind — who knew so many things that used to be around just plain aren't anymore? Maybe your mind will be blown too:
1. "Acid rain. It was a huge environmental issue in the late '70s through the early '90s. Rain was acidic and damaged fertile areas, among other things. In the US, there was much research done, and eventually industrial regulations were put into place. Companies were allowed to decide what approach they chose to take as long as the results showed the appropriate amount of reduction in sulfur dioxide emissions. Unfortunately, positive news doesn't sell, so news outlets did not do justice to reporting this success. As we went into the 2000s, hardly anyone remembered what was done."

2. "Waterbeds."
3. "Facebook poke wars."
4. "When you turned off the TV, how the image would shrink to a dot before slowly fading away."

5. "Flash mobs."
6. "Traveler's checks."
7. "Those red coupon dispensers that used to be inside grocery stores."
8. "Picture-in-picture TVs."
9. "HQ Trivia."

10. "Actual toys in cereal boxes and Cracker Jack boxes."
11. "StumbleUpon...I remember all my classmates and my mom used to use it years ago."
12. "McDonald's All Day Breakfast menu."

13. "Altoid sours...those tangerine ones hit different."
14. "ROFL dropped off the face of the planet, and now we just go straight from LOL to LMAO."
15. "I think people have noticed now, but at the time, nobody noticed it was happening: 24-hour stores. I live in a major city, and ever since the pandemic, we don’t have a single 24-hour grocery store."

16. "Politicians feeling ashamed when they're caught lying."
17. "Planking."
18. "Public spaces where you have a reasonable expectation that you are not being filmed."
19. "Ringtones. Jay-Z said no more and they were done."

Agree? Disagree? Have your own additions? See you in the comments!
Note: Some responses have been edited for length and/or clarity.