I have 100% gotten worse at video games after 25. I don't think it's reflexes, I doubt my reflexes have changed enough to matter for the gaming I do. I know at least part of it is lifestyle. I can't put as many hours into gaming anymore, I'm out of school and tbh I'm a bit out of the habit of pushing myself mentally, which I think has made me a slower learner. Actually I'm glad I'm typing this out cause I hadn't thought about it this and I'm sure now that I'm aware of it I can turn the trend around.