Recently purchased four Primacy 4 to substitute 4 Dunlop Sport Bluresponse, which were down to 2mm in 28.000 miles (45.000 km), permutations included. I live in Spain and my driving is about 20 miles (30 km) a day from the city towards an industrial area. My other option was the Goodyear Efficientgrip Performance 2, but an offer for the same price made me choose the Primacys.
I was surprised as I checked the initial depth at about 6.5mm in the center channels and slightly less, about 6,2mm, in the outer channels.
I just hope they last longer than the previous. They are made in Poland, weeks 10 and 11, so just before this virus disaster.