No 220 B&W on the market. Kodak discontinued the last TXP a while ago and Ilford doesn't have the machines to do it - you would assume it would be easy to do (just make it twice as long) but from a number of discussions, it is not easy at all. Different base, different type of paper and harder sell. So there is some colour and I think there is one-two slide films (don't quote me on that) but that is it. Look at the price for 220 only backs and they are a quarter what a similar 120 back sell for, for this very reason.
Not a different base. The paper's different in that it is only at the beginning and end.
It's listed by Fuji and Kodak for most slide films, but I don't know if their websites are up to date on actual availability.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.