I don't have a problem with the idea of moving the world to a common standard. But as you say there are so many incompatible connectors over the last few years.
Ethernet is a strange one...the connectors are weak and easy to break off the locking tab but they work fine and have not changed in at least 20 years. The cable has changed in that time but for the general public only those actually using Gb Ethernet would notice.
I think that the reason Ethernet cables work well for most people is because they don't really get connected then reconnected 3-4 times a day.
In many instances they get connected for 3-4 years and left alone because they work.