I was going to suggest they confused MFi and e-marking for the USB-C cables, but it appears you only need e-marking for above 60 watt applications, which the iPhone 15 isn't going to require. Good news all round.
Maybe for people new to the ecosystem. Most existing users have had their existing inventory of cables suddenly rendered useless for future phones. When I eventually upgrade, I will have to buy at least 2-3 additional cables (I am not a fan of dongles). I will spend this money even though there is no tangible benefit to me as the only USB-C device I have is a Kindle.
My non USB-C device is: eBook reader
I do have a bunch of Lightning cables, but I also have more than enough USB-C cables because literally everything else uses it, and I'm looking forward to not needing to bother with carrying a special cable around for one device anymore.
The eBook reader is a minor nuisance with micro USB charging, but battery life is long enough that for short trips I don't even bother bringing a cord for it. And around the house I can unplug my Qi pad and use its micro USB cable.
EDIT: forgot one more USB-C device, it's also on my Ryobi battery bidirectional charger. Don't use that frequently, picked it up for power outages. But it means the Ryobi provided charger in the garage which I sometimes use for headphones will be able to charge my next phone as well.
- standalone speaker
- charging stand
- AirPods case
- and of course all the cables
I don't know how common/rare my use case is, but I can say that this switch is basically all downside for me.