I am going to have to get a water purifier not because I am "ZOMG THERE'S IMPURITIES IN THE WATER THINK OF THE CHILDREN!" or "DUDE UNFILTERED WATER MAKES COFFEE TASTE LIKE MUD" but because the mineral build-up in my espresso maker is noticeably impacting on it's performance.
That's why we got one (except for our electric kettle). Unfortunately it slowed but did not fix the problem!
I'm hoping it will slow it enough that regular vinegar treatment will be able to take care of the rest for a long time.
People sure get upset about living in an area with mineral water on tap.