What missing functionality?
When chips die, that's not something the standard could affect.
When a USB to Ethernet converter happens to be on the same circuit board as an actual hub, the USB standard isn't responsible for the Ethernet part.
The screen connections are pretty much just passthrough. That's the narrowest you can get.
And it doesn't sound like the USB ports on the hubs had any problems.
If you split things up by standard, you'd have a USB hub that always works, with a flaky ethernet converter plugged in one port and a flaky HDMI converter plugged in another port.
