My 4 year old (maybe 5?) work laptop has 3 usb C ports. My macbook is all usb c, and my home media/gaming PC has a mix and match.
All my cables I would connect to my home PC/macbook are USB C. IE bluetooth adaptor, sd card adaptor, external ssd, mouse/keyboard, a soundbar etc.
I have several chinesium clones of dewalt batteries/tools, IE lights, compressors etc. They all have USB c output.
"most pc perihpials are USB-A" is not exactly correct for some time now. (not that I'm a fan.)
USB C ports cost a lot more, needing extra controller chips and special HCIs. USB-A, especially 2.0, is dead cheap. I would've expected more than 3 though? Standard consoles used to support 4 controllers, plus you'd probably want a mouse and keyboard at the same time if it's also a PC. I guess it's fine if you're assumed to be using wireless controllers.