People on this forum are not representative of Mac users at large. Many people buying Macs will not know the difference between HDD, SSD, or Fusion. They will expect that a Mac that they are shelling out quite a bit of money for will feel speedy and last them a while. Especially given the difficulty of upgrading the hard drive (or the expense of getting a professional to do it) IMO it is unfair to sell such a computer with a spinner.
It's great that the low-capacity Fusion has arrived, but they need to make it standard. At the moment, all of 3 basic 21.5 iMac configurations (as in, the ones you can buy off the shelf) have a 1TB spinner as standard, as do the 3 basic Mac Mini configurations. I personally think this is unfair to unknowing Mac users. Of course this allows Apple to say that Mac Minis start at £399, and iMacs at £899, but I just disagree.