Filters like britta make your coffee or tea taste nicer and you barely have to decalcify your machine or kettle.
But healthier? Never seen any study that proves it (it would be nearly impossible to really make any claim stick, because tap water varies quite a lot across regions and countries)
I started to really feel I was doing alright in my late twenties. Got less selfish, learned to accept my flaws, own my mistakes and be less of a dick. I learned to just bluntly admit that I don’t know certain things. Got even less competitive. And started to enjoy just listening to people. Worked wonders for my self-esteem. And it made me A LOT more likeable to be around.