It's no different. And as it was then, it's the right decision now too.
Not quite.
...in 1998, the CD drive could store over 400x more data than a floppy disc. Major software packages and operating systems came on
whole boxes of floppy discs - or a single CD. The floppy was
really only still around because all PCs needed them for booting, installing firmware etc (it was baked in - even PCs that supported booting DOS/Windows from CD-ROM involved a virtual floppy image on the CD). A file sent via the internet could get to the other side of the world in minutes vs. several days in a jiffy bag for a disc. The other ports dumped at the time of the iMac included things like ADB (completely proprietary) and RS423 serial (technically a standard but everything else used RS232 and different connectors). In short, the stuff dropped was well and truly obsolete and the new alternatives were
night and day better.
C.f. 2016: USB-C is less annoying than USB A because it has a reversible connector. Wow! For USB devices, it offers no more bandwidth than a regular USB3 A/B connector (USB 3.1g2 works on A-connectors on PCs where the controller supports it, BTW - and while USB
3.2 will double the bandwidth, no current computers can support it) - oh and it supports DisplayPort... but the intel controllers used by Apple only supported DP version
1.2 which was already old in 2016, can't drive 5k over a single cable, (in USB/DP alt mode) and can't do 4k@60Hz without using up all the data lines on USB-C and blocking all USB 3.1 data. (I think the 2018 MBPs finally support DP 1.4 but I haven't heard of any USB-C displays that do). In 2016 there were pretty much
zero USB-C devices, and even today there aren't that many that don't work just as well on a USB A port (and if they're not sold by Apple the USB-A adapter is usually in the box).
Now, Thunderbolt 3
is better than Thunderbolt 1/2 - maybe twice as fast,
can support 5k (still a MST kludge though because DP1.2) - but its still hardly floppy vs. CD. Bluetooth keyboards are
no better than wireless-dongle ones - of which there is a far greater choice, especially the latest BT versions that don't eat batteries...
I could probably live without a SD card slot in my Mac (I still
need one but maybe not built in) - but I'm sure others don't agree, and they can also be used to boost storage on a laptop.
That's the problem - Apple's post 1998 brave new world was driven by
revolutionary improvements in technology. The post-2016 "vision" is, at best, evolutionary, and that's being polite. For many, its just the industry trying to force us to upgrade, or buy extra stuff, without offering any major strides in performance. Which, of course, is the real point - technology development is slowing and computers don't naturally become obsolete after 18 months any more, so it has to be forced.
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At no point have I mentioned legacy ports.
You didn't get the memo - USB 3 A, Mini DisplayPort and Mag Safe (as featured in Apple's currently-selling MacBook Air, Mini and Mac Pro models, along with every peripheral some of us own, including stuff bought new this year...) are now "legacy" according to the First Church of the One True Connector. Actually, the USB-C/TB3 ports in the 2016/2017 MBPs and iMacs and any TB3 peripherals you have are also "legacy" because the new TB controllers released early this year added significant new features like DP1.4 support and USB device mode...