It’s fun and sort of useful with my 6th gen regular iPad and my otherwise horribly underpowered (I’m pretending to be a 4K iMac and apparently that’s powerful enough for Sidecar, but the actual processor and its iGPU are slower than a 2015 Mac Mini). I can see how it would be super useful with the 13” model and an Apple Pencil, neither of which I own.