So I have an artificer armorer that was recently cursed with lycanthropy of the werewolf variety. In the Arcane Armor description, it says:

You gain the following benefits while wearing this armor:

• If the armor normally has a Strength requirement, the arcane armor lacks this requirement for you.
• You can use the arcane armor as a spellcasting focus for your artificer spells.
• The armor attaches to you and can’t be removed against your will. It also expands to cover your entire body, although you can retract or deploy the helmet as a bonus action. The armor replaces any missing limbs, functioning identically to a limb it replaces.
• You can doff or don the armor as an action.

My question is this: if and when I inevitably discover my curse in the worst possible way, will my armor be destroyed, doffed, or will it automatically expand to fit the new form? Does the aforementioned expansion only happen when you create the armor, or will it happen in the excruciating moment as fur grows, the spine elongates, and muscles swell? This could obviously also apply to wildshape druids who don't want to lose the benefit of their armor (mine is made of chitin).

Thanks for the response. I didn't even think about how much the armor is a part of you, although I do have to disagree about a few things:

if we consider black pudding or gelatinous cube acid, black corrodes metal but your metal merged by magic with your flesh so its organic and on gelatinous they acid but you are covered completely you still take dmg because the armor is part organic now

Consider heat metal normally, heat metal could kill but if it burns your surface skin the armor replaces your skin, skin is a limb, so you cant die from burning and freezing

While it could make sense that the armor bonds directly to your skin, in no place does it say it replaces your skin or becomes organic. It is still metal, so it could be corroded by anything that could corrode magical metal. And because it is still metal, heat metal would still damage you (in fact, if it had ACTUALLY replaced your skin, you would take A LOT more damage). I think this is part of the reason you can don and doff it as an action, so some druid with an Intelligence above 12 can't cook you alive. It helps to save you from Heat Metal as well as environmental effects such as being dragged down in water. It also means that you can take off your heavy armor when sleeping to remove exhaustion and put it back on quickly when the inevitable ambush happens.

Lucky for me, though, I crafted my armor out of chitin because of my old druidic background. And yes, it is hard to play an Artificer who doesn't work with metal.