I can’t answer your specific question on compatibility of bolts and spurs. I have an uneducated guess it would be really annoying and loud and suck.
but, setting my 4 squirrel step ROS hasn’t taken me longer than a minute on the last dozen or so sits - I’ve been paying attention on purpose. It weighs less than a pound. I vet wrap the steps so no noise. I hang it from my right lineman’s loop, and deploy it at chest level while climbing up so it’s easy to access and easy to deal with.
I love the idea of presets. I don’t have any and don’t see it in my future. But a preset ring of bolts doesn’t seem to offer a significant advantage over SSROS. One big disadvantage is the sun coming up only to realize you need to be 6” lower to cover a shooting lane or avoid a branch that lost its leaves and moved up. You could just drop down and readjust ROS, but bolts you’d be stuck.
food for thought - I know you didn’t ask and it isn’t quite on topic. But might be useful.