In my experience, sleep definitely gets worse with age. I often can't fall asleep even when exhausted or wake up multiple times sometimes unable to get back to sleep. That's why I put such a premium on it. Sleep decides at least 50 to 75% of how my day will be, maybe more. It's by far the most important bodily function, imo. Exercise is second and can undo many of the effects of bad sleep temporarily, but there's nothing like a good night's sleep. I would not skimp on it. The anti sleep culture that exists is horror and hell to me but to each his own.