Hi 1P_Dave, I was looking for a merge feature, and came across at least 8 request threads in the community over the years (this being the most recent one). Gmail has a 'merge contacts' feature and a similar solution would be a great addition for 1Password (in any shape or form). Use cases that have already been mentioned are different URLs for one service, but I for example also have imported passwords in the past from a browser that ended up generating duplicates in my vaults. Also, sometimes app logins don't merge with website logins, etc. etc. There are more usecases than you'd think.
Long story short, put me down for +10!