Screws all of the time!
The likes of the Wago Wall-nut aren't available at my supply house's except for samples, that everyone leave at the counter... So, they are not really available. I really like the idea but some versions don't have the nessesary versitlity of capacity for stranded/solid #12 for 5 conductors. Not sure if I would trust a 3/4-wire neutral connection with them. How-ever, some of those European screw-type pressure connector though... Wish they made them for applicable use here.
In terms of speed, you still have to strip the wire, and put one on. One could reduce the fatique of the wire nut by using a wire-nut-driver, or my favorite a wire-nut-driver on an impact wrench.
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