Ask HN: Why are there no USB-C only “hubs”?

It's been several years since the USB-C only MacBook Pro is out. Many manufacturers have followed, and USB-C is very common on many devices already. Virtually every device I connect to my Mac on a daily basis uses a USB-C connector. So it follows that 4 ports are no longer enough when I'm doing lots of stuff. For example, right now I want to connect:

* USB-C External SSD for music/movie library. * USB-C External HDD for time machine backups. * USB-C Ethernet adapter for LAN. * USB-C to Lightning to iPad for Xcode debugging. * USB-C Power Cable.

As you can see, that is more than 4 ports can handle. I'm sure this will only become more common in the near future as more people buy or upgrade their accessories to USB-C.

Considering how ubiquitous USB-C 2 hubs once were, you'd think that the same thing would happen to USB-C. However there are exactly zero results for a USB-C to many USB-C ports hub, or anything of that sort, for any search term I try, either on Amazon or even on Alibaba. So from this follows the question:

Why? Has the market just not catch up yet? Or is there some technical limitation to creating such a device? Considering the mess the USB3 standard is (and USB4 does not improve on that issue at all) I wouldn't be surprised if that's the case.