The part that baffles me is that this wasn't planned at all. I didn't restrict any race options, the players could choose any race they wanted (and I also allowed the customization options in Tasha's Cauldron of Everything.) I didn't have any houserules or restrictions for darkvision, either. The players could choose their spells from any WotC sourcebook they wanted, they could purchase their equipment a la carte, and they even got to start with a free magic item from Table B.
I was deliberately hands-off with their characters: I wanted them to have free reign to play exactly the character they wanted to play, and then I would shape the world around them. (You know, the opposite of what usually happens with homebrew campaign settings.)
The odds of this happening were almost nil.
I'm really looking forward to looking at the sword-and-board Fighter and asking, with a straight face, "Which hand are you using to hold the torch?" Because just this once, after more than three decades of playing D&D and seeing the same clichés, the fighter won't be able to beg the mage for a light spell.