I want to add the following feature request:
I would like to have an internal usb hub and/or card reader with physical On/Off Switches for each hub or card slot.
And maybe you can also turn on / off all hubs and card slots using just one button.
Of course this idea also applies to the expansion cards.
There are already external usb hubs that have physical On/Off Switches:
https://www.thesource.ca/en-ca/computers-tablets/computer-accessories/all-computer-accessories/vital-usb-3-0-7-port-hub/p/108062744