With a cable, you have to put your phone in a place AND put something in a place in your phone.
With a mat, you only have to put your phone in a place.
Obviously the latter is life changing. ;)
Seriously, however marginal, it is arguably a gain, and ... marginal gains can be kindof nice if they don't force some other annoying tradeoff. For me that'd include an appreciable cost higher than the cost of a long-lasting cable, but YMMV.
With a mat, you only have to put your phone in a place.
Obviously the latter is life changing. ;)
Seriously, however marginal, it is arguably a gain, and ... marginal gains can be kindof nice if they don't force some other annoying tradeoff. For me that'd include an appreciable cost higher than the cost of a long-lasting cable, but YMMV.