Not short lived at all, it’s literally one of the three standard connectors alongside A and C. USB is an inherently directional protocol, so one side if the host device and the other is the peripheral device. The difference between Type A and B plugs helped enforce that directionality. Prior to the C connector becoming the new standard regardless of direction, all USB cables had both a Type-A and Type-B connector. (A to A cables violate the spec, and are an abomination).
The miniUSB and microUSB connectors are both Type-B connectors, just physically smaller to accommodate smaller peripheral devices. There’s also technically a mini-A and micro-A, but they’re very uncommon since host devices are usually large enough for a full size plug, and now USB 3.0+ Type-C connections don’t require a directional cable the same way.
Not short lived at all, it’s literally one of the three standard connectors alongside A and C. USB is an inherently directional protocol, so one side if the host device and the other is the peripheral device. The difference between Type A and B plugs helped enforce that directionality. Prior to the C connector becoming the new standard regardless of direction, all USB cables had both a Type-A and Type-B connector. (A to A cables violate the spec, and are an abomination).
The miniUSB and microUSB connectors are both Type-B connectors, just physically smaller to accommodate smaller peripheral devices. There’s also technically a mini-A and micro-A, but they’re very uncommon since host devices are usually large enough for a full size plug, and now USB 3.0+ Type-C connections don’t require a directional cable the same way.