I did this a few months ago and didn't run into that problem. I basically did a "make before break" migration. I kept LastPass available for several months af

I did this a few months ago and didn't run into that problem. I basically did a "make before break" migration. I kept LastPass available for several months after importing the database into 1Password, while using 1Password day to day. I never needed to refer to LastPass, so I finally unsubscribed and deleted my account. I have read some others on HN describe stories where it didn't go so well. Private Notes not exported (I saw this on HN before I cancelled, but mine all came over), incomplete exports (I got everything), etc. But yeah... do be careful and give yourself a grace period.