I've long ago complained about the number of different USB connectors that you find on devices.

But different equipment makers use different connectors, so you might need another kind of adapter.

There were at least four different connectors used with ALDL.

The J1587 protocol uses different diagnostic connectors.

I'm tired of all the different connectors and ports.

In some cases, though, the host adapter end of the cable would use a different connector.

And in the second picture, over on the right, is a bank of all the different connectors which are available for that thing.

CompactPCI Serial includes different connectors that permit very high data rates.

Why are there so many different connectors on my DVD player?

Apple still wants to minimize the number of different connectors and cables required to attach your external disks, external monitors, etc.