Totally agree. I was comparing the Belkin 3 in 1 with the Material though, not the Duo. Once costs are added up, the Material combo isn't that attractive. For portability, the Duo wins out compared to both those other solutions.
Plug it in if you need just need to “charge”. There are even wireless charging pads if you don’t want to plug it.
I was legit wondering and now found a use case for MagSafe, so I bought it. It’s now attached to my wall so I can charge my phone and watch vids before bed.