I'm sure they can go up in storage, but the more you add to them the more you increase the chances of fault. And these things currently take a hell of a beatin

I'm sure they can go up in storage, but the more you add to them the more you increase the chances of fault. And these things currently take a hell of a beating before they don't work anymore. There is also something a bit more auditable about a smaller storage. Though, even the small sizes are probably pushing the bounds of what can realistically be audited nowadays.