Sword of Spirit
Legend
It occurs to me that we are missing a fundamental distinction here. Both mechanics and fluff are part of D&D. The mechanics of 5e are a variant of the d20 system. 3e and 4e both treated their mechanics as separate from the game. You could license and make products with the mechanics that were not D&D! These products were generally fantasy games with a lot in common with D&D. But very few of the products licensed to use the d20 systems were actually allowed to place "Dungeons & Dragons" on them. And I can't think of any of them that were licensed as D&D products that didn't follow the official PHB class fluff. WotC most definitely makes a clear distinction between the mechanics and the fluff, and they apparently consider that both fluff and mechanics are important to considering something to be D&D.
So if you are using the mechanics in the absence of fluff (or, by inference, the fluff in absence of the mechanics) it is no longer the D&D game. It is a d20 game (or some other game with D&D lore in the case of fluff-only).
So if you are using the mechanics in the absence of fluff (or, by inference, the fluff in absence of the mechanics) it is no longer the D&D game. It is a d20 game (or some other game with D&D lore in the case of fluff-only).