AFAICT, the practice of using male supply-side connectors for grounded and equipment grounding conductors was generally abandoned over 10 years ago. Pretty much all new installations I see are all female on the supply site.
Your mileage may vary.
Interestingly, using male supply-side connectors for grounded and equipment grounding conductors is in widespread use in theater.
However...
All female connectors on the supply side is in widespread use in the film industry.
This leads to smart entertainment electricians keeping several F-F and M-M gender-benders in their tool kits for tie ins. The takeaway is that there really isn't a standard per se. Even older theater installations will occasionally have the all female connectors arrangement.
Cam-locks will continue to have a place where it's necessary to connect large loads on a temporary basis. The multiple connectors for each phase + neutral + ground means that they're only suitable for use by qualified personnel. I personally prefer the male connectors for neutral and ground, but that's just me. Heck, it's a good gig if the cam-lock colors match what they're being used for; most times, they're taped with colored e-tape to indicate phase, neutral, and ground
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