[asid61]

I like belts for everything other than drivetrain. Why drivetrain? Because for a given strength, chain is more compact than belts, and with the 4-cim loads in the drivetrain compactness is a high priority for me. That's a point that's often overlooked in the belts vs. chain debate.
It's also possible to run chain in tube in a 2x1 easily and reliably, whereas doing the same with belt is a lot harder.
Belts run quieter than chains, so for anything else- from shooters to intake to arms- I prefer them. In the specific case of arms, the belt will likely slip before the gears start shearing teeth (in theory), so I get a bit of a safety factor there.