I don't think everyone is "suddenly" having adhd and autism. I think millennials were raised by parents who were ashamed of having children that weren't "normal" so we were forced to mask so hard that we "seemed" normal but were "just a little strange" and now we're all learning to unmask.
For real though. I was just clumsy, messy, and loud but also super good at school and hyper focused on anything that resulted in someone being proud of me.
Turns out... yeah.
