Or at least, it was Mass Effect and the Dragon Age games where I first started seeing weapons floating on the backs of the characters.
Now, in some cases, I don't think it's an issue - a longbow would be slung over the shoulder when not carried. And I'd love to have an option for a slung quiver of arrows on my ranger's back.
Oh yes, Dragon Age. I am pretty sure they introduced that weapon-on-the-back style out of necessary (easier to program). Now people build questionable scabbards to justify it.
Amazing. They do have my respect though, it requires persistence and creativity.
As stated above: Larian, give us both and we will all rejoice!