One of those things I've things I've certainly read about over the years, but never really got into in detail.
Apparently BT 3 can cause interference in the 2.4 ghz range, thus causing problems for things like some mice and keyboards. Not sure what else, but those are the most common things mentioned.
I've also read (though not from really authoritative sources), that the same problem exists in 3.1 and USB-C. So this is one area I'd like confirmation on or even if they all do it, are some versions less of a problem than others.
I was told by a manufacturer of USB 3 hubs that the interference can come from the ports or from cables, though this another area where I don't know if one tends to be worse than the other.
I don't hear of problems with USB 2 or 2.1. So does this make it wiser to only use a 2.x hub for keyboards and mice - or does the slower speed offer any benefit to these devices on 3.x, etc?
Another question would be if there are any hubs (and cables) in particular that are better because of shielding?
And are there any reasonably prices devices than measure this interference?