Changing is not an overnight process, it can take decades. Of course some people don't like change because it's what they've always known, but it's not about us it's about our children and how it will impact on them.
I seem to recall it didn't take too long for us to get used to the decimalization of money. Mind you, even to this day my mum and dad can still calculate in the old system if you ask them to. I mean, look at this:
Two farthings = One Ha'penny. Two ha'pennies = One Penny. Three pennies = A Thrupenny Bit. Two Thrupences = A Sixpence. Two Sixpences = One Shilling, or Bob. Two Bob = A Florin. One Florin and one Sixpence = Half a Crown. Four Half Crowns = Ten Bob Note. Two Ten Bob Notes = One Pound (or 240 pennies). One Pound and One Shilling = One Guinea.