I don’t get it Might be the language barrier though …
I like the swappable frames because you can use the temples with prescription glasses. Which is a huge plus for every person that has to wear glasses anyway. Normally those people wouldn’t be able to use e.g. the sunglasses or the bluelight filtered glasses and therefore wouldn’t be able to use the Sound frames at all.
I think it’s rather clever to include those people in the market group.
Wireless charging for the temples would make the most sense for me. This way you could just put the glasses on a pad and maybe even have a specially designed case for them as @Duane_Lester suggested. Similar to the one of the Liberty Pro Case.
But a wireless charging pad would suffice too I think. This way you could place the frames on the pad on your table e.g. next to your laptop and have them loading while you have a lunch break or something like that …
And a wireless charging pad is quite sturdy. Plus you wouldn’t have to fiddle with the hinges or disconnect the temples from the front glasses.
My vote is for a wireless charging pad