EVERYONE has a water softener around here. Our water is horribly hard, don't know the number but we have friends that own a water softener dealership and our town always tops the list for the most sold/rented. Around here not having a water softener is a negative for selling a home.
The softeners around here last about5-10 years if you are lucky. Many people rent them because they don't last that long. Elsewhere they last longer.
I used to like hard water, until we got a softener and now I can't stand hard water. Our softener is only hooked up to the hot water line, which is common around here, so if you take a drink of water out of the tap, you don't get that salty taste. I use about 1/4 of what is recommended for laundry soap, dishwasher soap, etc. My hair is SO much easier to deal with in soft water.