Thanx for the topic & the links, Pug.
I do find the 'layered' stamps interesting--especially the clear versions. And that's saying a lot coming from this rubber lover.
As I've shared, I stenciled lots before I stamped. The layered stamps remind me of 'separated stencils'. Although I rarely used them, they were great when I wanted to avoid doing tons of masking &/or wanted to work with multiple colors.
Would I find layered stamps limiting? Probably not. Might take me a bit to figure out how
I would use them, but that's often a part of how I work.
Would I have to use multiple colors? Nope. I'd just play with 'generations' of one color & the various layers to produce complete images that I like.
The clears have an advantage for 'eyeballers', too. I have no desire to buy stamps that
require special registration tools--no matter how cheap or easy. They are just one more thi9ng to keep track of & that's not how I roll.