I have a cross check, which I like.
My lowest gear is 22 front and 30 back -I'm guessing that qualifies as a "granny gear"
There are enough hills here and I ride long enough distances when I am far enough out of shape that low gears are important to me.
As well as "Granny," now close is gear 2? A big jump between them can make things like the climb up 16th street hellish.
I used to have a cog that made a super granny by having a leap to the biggest cog - it really didn't matter whether I shifted from 1st to 2nd or if I changed the front gear. Hated always wanting to be in-between.
I think I use gear 2 (22F, 26B) more than any other gear on my bike.
Mick