It isn't actually hope that I do this on. I do this on experience. I have a 2015 MacBook Pro that was $1200 that has an SSD (yes Apple can put an affordable SSD in the iMac if they chose to do that) and it performs beautifully. It's a slower processor (laptop grade and a few years old) and 128gb SSD. So I was SHOCKED to find out that the new i7 21" iMac (I liked the smaller screen and I don't need lots of hard drive so I got the 1tb fusion drive) that my new iMac with the i7 processor (which is super fast if you see the ratings) was substantially slower than my 2 year old MacBook Pro.
I seriously DO NOT need any other evidence than that.
I am wondering if those that buy the 1tb fusion drive are just so used to things being slow on the OS side that they think it is normal behavior. But the response from the OS is substantially better with a SSD drive. I went above my budget for the iMac to get to a machine that would at least perform as well as my SSD laptop (now I have it). It is just disappointing that I can buy a 1200 laptop and get better performance than the 1800 I spent on the 2017 21" iMac i7 1 tb fusion drive. Terrible. I seriously can't believe Apple even sells that configuration. And many people don't need 2 or 3 tb drives.
I'm just speaking to my experience. And boy was it an unhappy 2 month ordeal to get me to the machine I have now (which is amazing). And it is extremely frustrating that people are supporting the fusion drive because that doesn't incentivize apple to move away from this archaic technology. We need to have all Macs with SSD options only. The price won't go up with the Mac because they get volume discounting. They are just making more money selling 28gb SSD and 1tb 5400 rpm hard drive combos than they would selling 256 gb SSD drives. They SERIOUSLY need to fix this. We can't encourage them.
Well I agree, a pure SSD is by far a better experience on any system/OS. Its a performance difference that any users can "feel" and realize throughout their use regardless of what they are doing.
And your point about people more or less feeling a HDD or Fusion is ok because basically "they've known no other" is very valid. I use both SATA SSDs and HDDs daily and SSDs still shock me in performance at times (mostly boot). And its no surprise if you are coming from a pure SSD then going to an HDD (or Fusion prior to it sorting itself out) you may find the performance underwhelming at best. Although that carries the caveat that with a Fusion that not everything you do is stored on it because if so then there is no performance difference.
Regardless that shouldn't distract the fact that many users are still happy with their purchase. Especially if they favor the space over speed. Keep in mind, speed is relative to the user and their usage. Everything I'm doing right now (transcoding a bluray, and switching between Safari for MR, Messages, Photos and Gimp) is using around a max of 7 MB/s read and 2 MB/s write.
Pure SSD levels of performance would be realized with this workload with even with a 1tb Fusion, since they are (core apps + Handbrake and Gimp easily fit into 24gb). And the file to and from Handbrake couldn't even max out a decent thumb drive.
Now I'm not saying a Fusion drive is as good as a equally sized SSD just putting real world perspective on it from a different (my) point of view. Again I prefer an SSD and would gladly spend the additional money for one. But if someone said they did a couple piddly task on their Mac I could certainly understand the reasoning for not needing anything more than a Fusion Drive.
As far as storage options. Apple has been leading the market with quality options for a while now. Yes 5400 RPM HDD sucks but its commonplace amongst many computer manufacturers. Manufacturers like Dell and HPs "fusion like" options include a 32gb msata (slower than Apples 24gb PCIe) combined with a 5400 RPM HDD (slower than Apples 7200 RPM HDD used in the Fusion) using much dumber tech to fuse them working of a hardware level not OS. Many offer SATA 3 SSDs as premium options. And its hard to find 1tb SSDs and nearly impossible to find 2tb SSD options (I couldn't find any but said "nearly" to cover my ass).
I think you got the supply and demand thing backwards btw. Buying SSD options doesn't encourage them to not make HDD options. If anything it encourages them to not reduce the price of SSD options. If you increase the demand of a product the last thing that is done is reduce the price of it.
We'll eventually see SSD only options in the iMac when the price of PCIe SSD comes down to the point they can't put a reasonable price divide between them anymore. Thats assuming there isn't something better out of course. If so we will just be here debating slow PCIe SSDs vs next gen storage. Lol