Further, the 2014 model is not even comparable to the 2018 model other than name and case format.
There was
no 2014 Mac Mini! Next thing, you'll be claiming that there were two sequels to
The Matrix and that Apple once made a mouse shaped like a hockey puck...
Seriously, though - the idea of a $500 "mass market" desktop Mac to tempt people into the Apple fold is probably dead, subsumed by the cheaper iPads. Today, the average person in the street, if they're not happy with a phone/tablet, wants a laptop - if Apple wanted to address the low-end mass-market with a Mac, they should have built the new Air down to a lower price (which is an argument for another thread).
I don't think that theres much disagreement with the idea that the 2014 models were neutered by the lack of quad-core processors. With 4- and 6- core "desktop" processors (rather than the old mobile-class CPUs) the new Minis are clearly going to stomp the 2014 range into a greasy puddle, so there's no point in price/value comparisons.
So I think the comparison is with the "better" and "best" 2012 Mac Mini models that were actually quite powerful for the time and
obviously have a niche going by the way they've held their value... and were broadly speaking in the same $800-$1200 price range as the new Minis. That is problematic because it comes down to how much technological progress you expect "for free" after 6 years.
Issue 1 - does it matter that the $799 model has an "i3" branded processor? Its still quad core, and has a reasonable fixed clock speed (without turbo-boost) and there
aren't any quad-core 8th gen i5/i7 desktop chips - they've all gone hex core. If it gives a decent performance boost over the $799 2012 (which is
still $500+ second-hand) who cares? Remember, these are now desktop-class chips.
Or, have Apple greedily gimped it with a cheap i3 simply to create an artificial "4 core good - 6 core better" distinction?
Issue 2 - Graphics. Basically, as long as the iGPU is powerful enough to run the UI smoothly who cares? These are not graphics workstations or gaming rigs, and 2018 integrated graphics are probably
relatively more powerful in modern terms than the iGPUs in the 2012 Minis were w.r.t. their contemporaries. Plus now we have the option of external GPUs if we want
really good graphics or GPU-based computation.
Or - is it ridiculous that they haven't gone with a dGPU? Bear in mind that the Mini form factor was designed to hold an optical drive and a spinning-rust HD so space/cooling shouldn't be an issue. What about those i5/i7 + Vega Intel "semi-discrete" chips that are now available? As for eGPUs - seriously, have you seen the
price and
size of those beasts?
Issue 3 - Storage. The "server" version of the old 2012 Mini could be fitted with 2 hard drives, each of which could either be SSD or HD. Yes, the new machine can take 2TB - but that
has to be super-fast Apple-proprietary PCIe SSD, so get ready to sell a kidney. If you want a lot of
affordable storage tucked away in a neat little box with one power cable (which made the old Mini server so attractive), then the new Mini really is a non-starter.
Or If you're going to take the approach that all you need "in the box" is space for the OS, applications and temporary files, and everything else is
better on external drives, NAS or the cloud then the 256GB in the $1099 model is probably fine - but the 128GB in the cheaper model is still pretty hard to defend (bear in mind that a full Logic Pro - one of the applications that apple are touting for this - sound library install is about 60GB, and many users will have a ton of third-party instruments that would make sense to install on the system SSD) and woe betide you if you need to upgrade either model.
Issue 4 - RAM. There's no way of getting around this one - Apple charge twice as much for a RAM
upgrade than the
retail cost of buying the SODIMMs from scratch. These aren't some Magical Special Chips, its just bog standard commodity SODIMM RAM. That's just pure, unforgivable greed. Even if it turns out you
can upgrade these yourself, having to buy 8GB and chuck it in the bin is stupid. So far, its not even clear that you'll be able to do that without hacking through glue, removing heatsinks and voiding the warranty.
Personally, I've currently got a recent iMac, but if I were looking to upgrade, the i5 Mini is somewhat attractive, but I'd probably need to close my eyes, think of England and stump up for a RAM upgrade.