Real-world use cases for map's None fill-in feature?

[Cappy2112]

I haven't used itertools yet, so I don't know their capabilities.

I have used map twice recently with None as the first argument. This
was also the first time I've used map, and was dissapointed when I
found out about the truncation. The lists map was iterating over in my
case were of unequal lengths, so I had to pad the lists to make sure
nothing was truncated.

The most universal solution would be to provide a mechanism to
truncate, pad, or remain the same length. However, with the pad
feature, room should be provided for the user to add the pad item.