I guess some people would prefer the good ol' days.
Yes. Due to the system-on-a-chip approach now, let's ignore extensive slots for much cheaper 3rd party DIY RAM upgrades. And even external graphics cards. Hey, who needs a tower or mini-tower, right?
Well, at Apple's ghastly prices for big internal SSD capacities (around $1,200 for a 4-terabyte SSD), people have these choices:
1.) Make do with less.
2.) Get gouged for big money.
3.) Attach an external SSD, either ready-made or buy SSD and enclosure and put it together. Even with Thunderbolt 3, you get slower-than-internal data throughput, and of course the 'dongle' effect of another gadget attached to your system like a parasite (some are bus-powered, so the analogy works).
If the new systems come with Thunderbolt 5, then OWC's new $600 4-terabyte external TB 5 SSD could be a game changer, closing a lot of the distance in terms of data transfer speeds.
But with a tower, we could buy the lowest capacity SSD (since it'd be largely ignored), put in a 3rd party big SSD way cheaper and get internal speeds. Sweet! Then drop an internal hard disc drive in as a backup disk for Carbon Copy Cloner or Time Machine, all in the same box.
And there is a middle ground. Since the overwhelming majority aren't using optical drives these days (and no need for lots of RAM slots), one could cut that tower to maybe 2/3rds the size without compromising the functionality I'm talking about. Even if it were $100 extra over the cost of the anticipated Mac Mini, it'd be very cost effective for many end users.
But just as Superman had his agenda (truth, justice and the American way), Apple has their's. Unfortunately, it seems to be thin, minimalist and big profits (via BTO price gouging).