I have so many hardware signers it's embarrassing. And I do own a Q, which is a magnificent device. The slots thing would get deeply under my skin if it would get used up by temporary seeds. Thus, ephemeral seeds, as well, which don't have to be saved to the seed vault. I don't think the possibility of me using up all 256 slots is very high the way that I use the Q. But it certainly begs the question of why. I haven't found a reasonable explanation yet. And if the why is literally planef obsolescence, that would be extraordinarily uncool.