Role (B007) deleted from Position

Hello,

We are trying to find the advantages of having the Role assignment Relationship (B007) against a Position being available in the system with an end date of the past, rather than deleting it totally from PO13.

So, we have 2 options:

1. When a position no longer needs a particular Role, either we delete it from PO13, then it doesn't show up when the selection criteria is ALL

2. When a position no longer needs a particular Role, we delimit it to a date, then it will show up with the selection criteria ALL

What are the advantages/pros of option 2 over option 1?