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Some basic info about USB
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this post was submitted on 09 Sep 2024
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You'd be surprised. My mouse only needs 2.0, but uses a C connector for compatibility. It provides an A to C cable with only 2.0 wiring, which is a decision I assume they made to allow the wire to be more flexible as it can be charged during use or used entirely wired.
Same with my keyboard, and I appreciate the compatibility. If it doesn't need anything faster than 2.0 speeds, there's no reason to include more expensive parts.
It's also important to permit use of adapters for backwards compatibility. Like, if we stop having computers with A ports, there are still gonna be some very expensive devices out there that have A ports. You aren't going to throw out your electron microscope with a USB A port because the USB guys have decided that USB-C being reversible is cool.
Oh totally. I have a pile of RS-232 adapters that you still need to program just about every modern Ethernet switch, and they're all type-A ports.