So there are 4 different current-carrying levels, from 2.5A to 5A EPR.
There are 6 different transfer speeds, from 480mbps to 120gbps.
There’s DisplayPort yes/no.
There are 4 thunderbolt genrations, each with its own marker.
Some of those are dependent (480mbps cables don’t have markers), so it’s not a full permutation problem. Only about 20 different combinations are valid.
Is the proposal to have 20 different physical connectors? Or to prune the space down to 6 or so by requiring all cables to be very thick, or to support higher transfer speeds than make any sense for a charging cable?
It’s not a leaky abstraction. It’s a physical interface standard that does not guarantee electrical properties. Same way you can plug a 6A cord and a 20A cord into the same electrical outlet.
There are 6 different transfer speeds, from 480mbps to 120gbps.
There’s DisplayPort yes/no.
There are 4 thunderbolt genrations, each with its own marker.
Some of those are dependent (480mbps cables don’t have markers), so it’s not a full permutation problem. Only about 20 different combinations are valid.
Is the proposal to have 20 different physical connectors? Or to prune the space down to 6 or so by requiring all cables to be very thick, or to support higher transfer speeds than make any sense for a charging cable?
It’s not a leaky abstraction. It’s a physical interface standard that does not guarantee electrical properties. Same way you can plug a 6A cord and a 20A cord into the same electrical outlet.