[meroje]

But I don't need or care about all that, what I need is a hub just like we had all those years that gives usb3 connectivity in a c form factor to 5 devices or more. If I need more there are plenty docking stations available.

edit: I also looked for a usb A hub with usb-c upstream, still no luck and stuck with a hub+power adapter and dinky otg a-to-c.

[Nextgrid]

As far as I know the spec doesn't allow it for some reason. I guess one reason could be the power side (which I haven't mentioned and I am not familiar with it)?

Let's assume the hub requests 19V from the upstream port. Unless it has built-in, variable, per-port voltage regulation, it will not be able to respond to power requests from the downstream devices if they differ from what is coming from the upstream port.

This isn't a problem when providing USB-A ports because you either request 5V from upstream and pass it through or request a higher voltage and have a single 5V regulator and pass its output to the downstream ports.

[Kirby64]

See, you could technically design something that does that. Per-port up to 100W charging it definitely possible. Basically you have a USB PD controller on every port with dynamic voltage control.

This is all possible, it's just a HUGE pain in the ass (and costs a lot) to design that way. The problem is you essentially end up with potentially a giant, VERY expensive USB hub. And no one wants to spend $400 on a USB hub.