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Quick upgrade for easy to plug and unplug end effectors/toolheads. Activity/status LED are also moved from the back of the printer to the top and some more voltage regulation to provide additional voltage rails.
While a nice connector adds significant cost it is also a big value add for certain 3D-printer. I think more manefacturer should consider tiny details like this when designing their product.
Strain relief isn't installed on this tool for reasons ...
I'm not sure this would be really helpful for toolchanger 3d printers, from what I've seen you normally want to keep them at a set temperature to reduce heatup time. Also things like CAN means there's no practical limit on the number of heads.