I'm coming from "a recently compromised" product :)
I've been trialing a variety of options and tested importing from an export of the alternative product.
For various reasons (including clearing out trial accounts) I've found 1Password doesn't really have a nice way to delete all passwords.
During my initial trial (I've now settled on 1Password) I found there isn't a nice way to delete all passwords (no way through the browser at all?). Getting the passwords in to the archive was simple enough however permanently deleting over 600 entries wasn't possible.
I could select all entries however when deleting nothing happened - there was no feedback to any progress and I just sat there wondering if anything was happening.
What did work was selecting a group of around 20 passwords at a time and then deleting.
It'd be nice to have a (hidden?) nuke option to remove all passwords to either re-import or for piece of mind when starting again/ migrating.
1Password Version: 8.9.12
Extension Version: 2.5.1
OS Version: Windows 10
Browser:_ Firefox 108.0.2