So is it possible to purchase access to the CPH SAS lounge if you are in Plus?
Yes
p.s. I haven't been to a SAS business lounge in ages. Last time was in the 2000s in OSL because the gold lounge was closed on that day (weekend). I remember that they had wine on tap. I thought it was Norway only because they drink so much.
But maybe that is a network wide "benefit"?
The one in ARN has wine on tap at least