I know Fusion Drives are a different beast to those old iMac 5400rpm HDDs. However, I do have to say that when I upgraded my Mid-2010 iMac's HDD to a Samsung 850 SSD, I saw a huge improvement in speed in every basic task I did. The thing is that while I don't do hardcore video or photo editing etc., I do multitask a lot. It's very important to me that apps and the whole system opens up quickly. So I would argue that even in basic use a multitasker who needs to do a million things a day values the extra speed. Moreover, as I mentioned in my previous post, things like the current APFS file system that favours SSDs (there are threads about people with Fusion Drives having issues with it) and the mere fact that it's only these iMacs out of all the Macs in Apple's computer line-up that use Fusion Drives would make me hesitant to buy a Mac with one inside. For me, the whole point of paying these premium Apple prices is that I'm pretty much guaranteed to have a working computer for at least 6-8 years if not more without any software or hardware hiccups. In order to maximise this (that Apple will provide OS X updates and will not drop features out of them because of old hardware), I guess it makes sense not to buy old tech or tech that has some components (like the Fusion Drive) that are not the standard anymore.