So here's my take on the Swift bands, admittedly based only on the Gold I purchased and returned.
It's what I call "fashion" leather. It looks and feels like butter...but it has extremely poor IRL longevity. It's kind of a modern day version of patent leather. That's a leather that's perfectly shiny...and as soon as it cracks, it looks like crap, because the finish is heavy and sits on top of the leather. Swift is like a modern-aesthetic, smooth version of patent.
Below are a couple of close ups of the band I returned. Look at the lower keeper. You can see that the pigment on the upper edge is just caked on - those cracks aren't grain, they are cracks in too heavily applied pigment (harder to control with such tiny pieces as the keepers). This is why these bands look so perfect in all the unnatural colors: they have a thick top coating of pigment.
The problem with this is it looks and feels pristine, but wears very poorly. Apple used a very similar leather for its Leather Link straps; I had one for three months and it started turning black on the wrist underside, not as bad as but similar to
the photo in this MacRumours forum link. Same for the iPhone 12-14 leather cases - they start turning black. Some people think this is patina, but it's not - it's the top coating wearing off. Once it's gone, the leather itself, which was finished to pick up and hold pigment, now sucks up any and all dirt and oil it comes into contact with...which is why it starts to turn black. (I hypothesize. I don't have proof. But we won't get any from the purveyors...)
I realized it's not a big deal to say this, because I think many people who get these bands have a lot of disposable income and/or collect multiple ones and so they rarely wear any one band. Nothing wrong with that. For me, if I'm going to buy something, I'm going to wear it. If it wears, I want that wear to look like character, not damage. Like raw/single-wash denim.
So in this sense: I'm on board with Apple here! Not only do I accept the synthetic bands may be more sustainable, they are also just
better value. Yes, that's right: worth more, in fact, than the leather bands. Because they will stand up to use. Caveat: to me
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