Not much terrain, but wicked winds around here. I can't see me ever going to SS or FG on purpose.

As it is, however, in the winter my rear shifter doesn't work so I ride as a SS. It seems to work OK then because the prevailing winds are light in the morning and at my back in the afternoon.

In warmer temps, I typically use 3 or 4 different gear combinations, but the wind dictates which 3 or 4. As I get stronger, too, I'm climbing up the scale of "typical" gear inches.

I rarely if ever need the granny gear, and only use the big ring when the mood strikes and I have a gravity assist.

Bottom line, is I like having gear selection, although I could certainly get by with fewer than 3 x 7. I've seen conversions that go down to a single ring, or maybe to a SS rear with two rings. There's an "in between" the full kit and SS, so anything is possible.