I can't give up this pleasure even if it's not healthy for my teeth. As well as other drinks or foods that affect teeth. But if it's normal, it's still ok, if it's exaggerated, then it's serious.
I had a similar period of daily coffee in my life. Started when I was 10 and has lasted over 60 years.I had a period in my life when I drank coffee every day, which continued for three years.