Me too. I've been carrying it around in my head as "the time we listened to scientists, and almost everyone worked together on some short term pain for worldwide long term gain". I was even hoping we might do something like that again.
There is some speculation that the unusual behavior of the ozone layer in 2023 is a result of the Tongan underwater volcano eruption in January 2022.
The immense amount of water vapor that was injected into the atmosphere likely just started reaching the south polar region after the end of the 2022 ozone hole, Antje said.
The water vapor could have led to a heightened formation of polar stratospheric clouds, allowing chlorofluorocarbons to react and accelerate ozone depletion.
Sorry to break it to you, we stopped using CFCs because a cheaper alternative came along. That it happened to be less suicidal was a happy coincidence.