I'm guessing that 7 comes from splitting J1772 from CCS1. It sort of makes sense, I guess. There are even a few EVs with J1772 but not CCS1 (eg, the early Chevrolet Bolt without the DCFC option).
I agree with you, though. Splitting it out is weird at this point. It'd be a bit like pointing at all the different grades of gasoline and saying filling gas cars is hard. 87 octane, 89 octane, 92 octane, e-85 (try explaining the difference between the 85% ethanol and octane to people for some real fun), race gas, 100LL, ethanol free in several octanes. And that's not even getting into oil viscosities. Of course, the real world isn't hard at all.
EV standards aren't really hard in the real world either, though there is a little learning curve.
I agree with you, though. Splitting it out is weird at this point. It'd be a bit like pointing at all the different grades of gasoline and saying filling gas cars is hard. 87 octane, 89 octane, 92 octane, e-85 (try explaining the difference between the 85% ethanol and octane to people for some real fun), race gas, 100LL, ethanol free in several octanes. And that's not even getting into oil viscosities. Of course, the real world isn't hard at all.
EV standards aren't really hard in the real world either, though there is a little learning curve.