Ahhhh. Interesting. That kind of bites. It's not at all what I thought was happening. So basically I'm better off just buying a USB3 hub and plugging however many HDMI adapters I want into that? Along the lines of Tony's question, would there be a bigger performance hit if I did it that way versus that USB-C hub? I suppose the main advantage of the hub is that I get that "one cable" arrangement, and it's sounding more and more like USB adapters would be the way to go in that situation.

This is mostly a thought experiment for suggesting setups like these to my customers. For my own purposes, I'd probably get one of the monitors out there that use USB-C with power delivery. This LG, for example. This Acer seems like a more affordable option, if I can stand the gold color.