The Samsung Galaxy S5 lineup was wild: 
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Switch 2 NDK
the Noftware Development Kit?
Alright - why?
We know power and data can go over a single one.
It can’t be for more power - one should(?) be sufficient for whatever I’m looking at.
Only thing I can think of is some video optimization.
More power, basically. Nintendo isn't the only one that's done this. Apple and dell both have laptops with them. https://superuser.com/questions/1615832/why-do-some-docking-stations-have-a-double-usb-c-plug has some other answers, such as video disabling certain functions.
This is a development kit, so the transmitted signals / pinout could have nothing in common with regular usb-c and they just needed more lanes than one usb-c cable can provide, leading them to develop this monstrosity.
Similar to the PCIe extenders that use USB3 male to male or HDMI as their connector / cable.
Bandwidth limitations. Power limits the amount of data, so use one for each, or double the data maybe?
A single usbc can deviler 240W and data at 40 GB/s, what else can it be other than vendor lockin by nintendo?
What revision is that, and that’s also seriously limited by cord length.
It’s anything BUT, it’s a dev kit lmfao.
USB 3.2 or 4 allows for a thunderbolt 4 interface, that runs at 40 GB/s (for external gpu cards). Thunderbolt also uses Power Delivery and the latest version allows for a 48V @ 5A profile, that would be 240W. Even previous versions allow for 24V @ 5V (120W).
As for the cable length I wouldn't really know, probably it's possible up to a meter, if the cable is well shielded, the power doesn't change much because the current os always rather low, it's the voltage that increases.
I don't know what it is really but I'd guess yo plug 2 things?
Very too close one tonthe other for me 😖
...i have hard drives that only work with the one power cord with that plug...
...need to clarify, i own 5 cables with that plug, but only one works...
You can edit posts here, you don't have to talk to yourself.
Is it actually that plug or is it just micro-usb B 3.0, because I’ve never seen a dual c port like that
In other news, there are also efforts from a lot of chinese companies to establish the GPMI connector, aka. wide boi usb-c.

This one is for media, as an HDMI alternative. It goes up to 8K (192 Gb/s) and 480 W of power delivery. I hope there is no DRM on those.
Some high power laptops do this too. You can even get special docks for them with 2 cables.
Look at Nintendo trying to be Apple.
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