Another voice calling for ditching the back-scabbards and storing of weapons there. They are just stupid and lazy and look awful. Ever tried drawing a four-foot sword from over your shoulder? Even an orangutan would struggle.
Please do keep in mind, that the "magnetic sword on back" solution is hardly ever a matter of laziness. In Baldur's Gate 3 there will likely be a huge variety of weapons and armour, which will have to work together in almost any possible combination. Wearing your scabbard on your left hip may look fine if you're using a rapier and are wearing a leather armour, but might cause clipping issues when wearing a full plate armour. Wearing the weapons on the back is a simplification, which would be impractical in real life, no argument there, but implementing realistic scabbards/sheaths/straps would make things really complicated. It would also add an incredible amount of opportunities for mistakes, like the aforementioned clipping issues, which would look even worse than a two handed sword on the back. Considering that, I don't think we will get this anytime soon. Of course, there are always modders...