[Moru]

It's pretty inconvenient when you are in an unknown location on a hotel. But yes, some areas of Europe has very hard water.

[eru]

For making coffee or tea, soft water is preferable.

For drinking straight up, hard water tastes better. At least to me. Perhaps because that's what I grew up with in central Europe.

Btw, the Romans also built their towns preferably in places with hard water.

[Moru]

I come from a soft water area and I prefer the soft water for drinking. Our water cooker never needs vinegar, it's just not getting the residue :-)