Cracking multiple WPA2 hashes?

Would it be more efficient to crack multiple WPA2 hashes (different SSIDs) at the same time instead of running hashcat in a batch?
I found an older thread about it and according to that thread you could add multiple hccapx files using a comma delimiter and it worked back then - maybe it has been removed ever since? The comma delimiter does not work for me (in Windows environment).

I've tried searching around but not found any "fresh" information about this matter. Can someone shed a light?

Thank you Phil.