I'm 47 and I quit drinking because my hangovers have gotten worse in the past few years. It seems sometimes I could handle quite a bit of alcohol without a hangover and sometimes two glasses of wine made me feel like dying the next day.
Also felt like what was once an occasional glass of wine was becoming something I had most days. Too many times when I had girls' nights, I wouldn't remember all of the conversations. I often felt shame and frequently had trouble sleeping. This all really picked up after the age of 40. Most dramatically in the last 4 years.
I do believe it has to do with aging and hormones because I did sometimes notice differences in my reaction to alcohol at different times of the month.
Regardless, alcohol wasn't making my life better so I tried sobriety and it is making my life better!