Nothing is really changing.
Currently:
- 70% of people have been buying the absolute cheapest lightning conforming cable they could find on amazon. They buy them in 3 packs, use them until they inevitably catch fire or fray within a few months and then throw them out and use the next one.
- 25% of people buy the cheapest lightning cable they can find on amazon that is rated for MFI. They've been burned enough by the bad cable and are just savvy enough to know there is a made-for-iphone program of "approved" lightning cables that actually conform to standards
- 5% of people buy OEM first-party cables from Apple
...
Now you will see:
- 70% of people buying the absolute cheapest usb-c conforming cable they can find on amazon (which is not "really" usb-c but the plug fits so who cares). They will buy them in 3 packs, use them until they fray or catch fire and then throw it out and use the next one
- 20% of people will buy the cheapest certified usb-c cable they can find on amazon because they are just tech savvy enough to know there is a difference and that its worth finding a good one. But this cable will likely only be usb 2 speeds.
- 5% of people will buy a premium usb-c cable with usb 3 speeds for 10Gbs transfer because they actually use and care about it.
...
As you can see, on the low end nothing changes. Most people will still buy the absolute cheapest cable they can find and have no idea what they are buying or care that there is a difference. These people will still benefit from being able to use the same cable for everything because it fits in the hole and thats all they care or understand.
But at least now there are more options and power available to the tiny percent of the population that actually does care and understand the difference.
All in all, its only upsides. Everybody wins. The only real downside is throwing out whatever collection of lightning cables you might already have.
Remember that as cool as transfer speeds sound, almost nobody transfers stuff using a cable off their iPhone. 99% of people will airdrop a few photos off, download music from spotify/apple music, and stream or maybe download from netflix or disney plus for offline viewing. But really VERY VERY VERY few people are transferring using the cable. For the people that do, they are probably transferring huge video files they recorded off their device and they will know to get a good quality usb 3 compatible usb-c cable. But thats like 1 out of 100 people, if that.