I've seen a number of sites advertise they support "hot", "warm" and "cold" wallet storage solutions (the only thing I haven't seen so far are "frozen" wallets).
What's the difference between the three? I think the difference between "hot" and "cold" wallets are pretty clear. But what makes a wallet "warm" instead of "hot" or "cold"?
I understand that at some level "warm" wallets are obviously more accessible than cold wallets (hence the name "warm") but how would they differ from a tech perspective - at what point is something hot and at what point is something warm?