Is there any progression on this?

I 100% agree and support this. I can currently use USB and Serial-over-IP solutions now such as www.flexihub.com, but those services don't always match the same great minimal latency Parsec delivers.

There's quite a few open source libraries to either reference or pull in here. USB/IP and usbredir are two I've found. I think emulating all input into an xinput controller is not the best.

Even a single USB throughput would be great. VirtualHere is extremely messy and complicated, with a ton of latency even on LAN. I think everyone would benefit, maybe Parsec could take advantage of VirtualHere?

Yes, Please do, it will enable many of the below mentioned features, AND PRINTER.

I will not subscribe until this feature is implemented and I am not trying to say this in a mean way; I am just saying that I have no need for Parsec without USB pass-through. I use a Steam controller which does not work normally. I also am into flight simulation so HOTAS and other flight controllers are mandatory to be able to fly an airplane on the VATSIM network. I also forgot to mention I have a USB headset and mic which won't work unless it was passed through. I REALLY need this feature and cannot live without it.

I spent a lot of time trying to figure this out about a month ago.

USB passthrough is supported with Windows computers using the app. https://www.paperspace.com/app

I was told they plan to get it working with Mac at some point, but they have no timeline for it yet.

I'd also like this to be included in the core application even though I think it is unlikely since a lot of software already offer this like VirtualHere

This is HUGE for me. I haven't tested my HOTAS yet, but that will be major for me once Star Citizen gets closer to release. Just some ideas for possible use-cases.

* Webcam

* USB Mics

* Hotas

* 3D Mice (Used in 3D Cad and possibly other programs).

* External Hard Drives (Could be useful for files you rarely access and don't want to pay an extra $5-$20 more per month for extra storage space)!

* Elgato Stream Deck (Could Game and Stream from the Cloud with this, webcam & mic!)