Holy cow! We just got the feature! It appears on the Customer page, right
column, in the Customer Data section:
Customer data
MERGE CUSTOMER
InfoNew
Merge two customers into one for a more accurate view of your customers.
This will combine order history and analytics.
But it seems limited or perhaps buggy. The first customer I tried resulted
in this message:
James Jackson has a credit card and can’t be merged.
I have no idea what that means.