• Can't use my phone for more than 10 minutes because it makes my eyes hurt
• Understanding the mechanics of new games feels harder than it used to be
• Can't easily remember the names of characters in a game/movie I'm watching
• Can't remember the names of functions for programming languages I've learned recently, always need to keep the documentation handy
• I find it absolutely counterintuitive to use "modern" functions in programming like lambdas (and functional programming in general can't get into my head)
• I almost always HATE changes in the OS and programs I use, while I used to love beta-testing stuff
• Can't get into new hobbies and interests
• Still listen to the same genres I used to listen to 10 years ago
• 2019 feels like a few months ago, not half a decade ago
• Getting worse and worse at rhythm games

I'm 33.