USB-A: there are so many crap usb-A cables around that either a) don’t charge b) don’t reliably send data or c) work, but with massive voltage drops leading to

USB-A: there are so many crap usb-A cables around that either a) don’t charge b) don’t reliably send data or c) work, but with massive voltage drops leading to very slow charging. HDMI: HDMI will silently degrade to lower versions of the spec over bad connections, so it might just be that the bad cables are invisible.