That seems...improbable.
I would bet that most of the devices are USB Micro-B. They probably came with USB-A to Micro-B cables, but you can get USB-C to Micro-B cables, too, and since USB-C supports a superset of the modes supported over Micro-B, there is no reduction in function (as there might be connecting a USB-C device with a USB-A to USB-C cable.)
Of course, if you did need to connect a USB-A device to your laptop, a USB-A to USB-C cable will do that, and are much easier to find than USB-A to USB-A cables you'd need if it was a USB-A-only laptop.
- 100% of devices with a hard-wired cable are USB-A
- Most of the rest are USB-mini or USB-micro and 100% of the cables that came with them or that I've acquired since have an A connector on the other end.
- Nearly all my USB-C devices are for recent game consoles and I wouldn't plug them in to my MacBook except maybe to charge them.
> Of course, if you did need to connect a USB-A device to your laptop, a USB-A to USB-C cable will do that, and are much easier to find than USB-A to USB-A cables you'd need if it was a USB-A-only laptop.
Oh gee I didn't know adapters existed, thanks.
Every panel in my house supports HDMI (so, great that they added it back). ONE supports USB-C, and only because I bought it to use with a MacBook.
Probably 75-80% of USB devices in my house that I might want to plug into my laptop are still USB-A. That might hit 50/50 in another few years.