@larryi I checked a bunch of Audiophile pressings. The lip appears flatter on the heavy records, but it is still there. The Wilco Record is not only dead flat but the edge is perfectly squared off. The lip is rounded off on all the other records. When you get a chance see if you can find a record with a squared off edge.
Viryl Technologies "Warmtone" is the newest record press. The molds are custom made for each machine and the lip would be the preference of the customer. I think it came out in 2017.