Mac marketshare is about 8%. not "Not even 1%". All it takes is a simple google search; there's never an excuse to pull numbers out of thin air and present them as fact.
Setting that aside, USB-C is a standard, moving forward. And in fact, it's already on (including exclusively on) a number of new laptops. Apple wasn't even the first this time.
Apple did the same thing with USB 1.1. They were the first to mass market with it; and when they did, they dropped EVERYTHING. Every single piece of hardware you owned before for a Mac, displays, mouse, keyboard, scanners, cameras, etc., would not work on the iMac. The iMac contained no legacy ports, and no Macs before it had USB. (At least not without a third party expansion card).
So, dongles. External floppy's because people still needed those (an 8MB USB thumb drive was $100, and you could buy a box of 10 floppies for a few bucks). And so on and so forth. The original G3 iMac didn't have a CD or DVD burner. Dropping the floppy was very premature for a lot of customers. In an age when networking was sparse even in offices, folks would pass floppies around with the files they needed to share. Now what, $100 8MB (that's an "M", as in, less than 6 floppies worth) USB thumb drives? CLEARLY networking, flash media, etc. was the future. But, even though it was the future, it wasn't there YET. Apple was premature then, according to critics. People had invested in Zip and later Jaz drives too for file sharing and storage; but those drives didn't work with the iMac or later G3 PowerMac.
Mac's aren't for pro's now because they dropped SD cards? Well what about when the G3 PowerMac came out. The iMac was easy enough to explain as a consumer machine; but when that G3 PowerMac came out, Apple was asking professional consumers to use a machine that wouldn't connect to their hundreds of thousands of dollars worth of external drives, Zip/Jaz drives, scanners (digital photography wasn't used as much in the pro realm then), printers, etc. So, yes... dongles, or new gear. So I'm not arguing whether or not Apple does or doesn't care about the pro market segment. But what I am saying, is this is something that's been going on for twenty years. If Apple stopped caring about pro's, it was when Steve Jobs returned to Apple and ditched highly expandable, super powerful machines with every port imaginable with candy-colored USB-only affordable (relatively speaking) machines meant to make it easy to sign up for dial up internet service. NOT when Steve Jobs passed away and Tim Cook took over.
Today? We say "Wow, Apple's foresight! The internet, home and office networking, flash media, that all usurped the floppy and traditional ports seemingly overnight!". And today, we say "How could Apple do this! Let's go back to when Apple didn't do things like this". When... exactly... was that?
The reality? It's seen as a good bet because USB took the world by storm very quickly. And it was much better. Instead of a port for a printer, a port for a modem, a port for a mouse, a port for a keyboard, a port for a game controller, and a port for a camera; all on different ports (and Mac's and PC's had DIFFERENT ports still); you had USB. Now, we've combined charging, displays, and high speed data into the same port.
That's going to be appealing to consumers, and it very well may take over very very quickly.
On the point of proprietary, Apple used to be the WORST at this.
Keyboard/Mouse? Proprietary "Apple Desktop Bus"
Display? Proprietary Apple Display Bus
Modem? Proprietary Apple Serial Bus
External Printer/Scanner/Hard Drive? SCSI. An industry standard, and superior to a PC parallel port, but it was used on almost no PC's. Similarly, PC's used IDE internal optical and hard disk drives while Apple used SCSI. Outside of server rooms and other high end environments; most PC's did not use SCSI drives. So again, not compatible. In the early days, they even used proprietary expansion slots. Though Apple did eventually yield to industry standard "PCI" slots.
And the list goes on. I used to have a Mac and a PC setup side by side and no piece of hardware attached to one could connect to the other. KVM switch to switch between them? No way, nothing was compatible, not even the stinking' monitors. I had an ADB Apple monitor, and a VGA monitor for the PC.
Apple should've included the SD reader and at least one USB-A port. However, USB-C itself is not the enemy. It's the right direction. It's an industry standard connector that'll be used across Windows, Linux, and macOS for many years moving forward.
