I would love if a premium feature was the ability to make a sandbox collection that can be deleted at any time. I would use this for trying out a new tagging strategy or practicing some form of migration/CSV import or export that I dont want to do on my main account.

I know that I can export my collection as a backup and reupload that and be back to where I was...except what if that export breaks? I find myself not wanting to do this thing because I can't really reliably test that I CAN restore from a backup without needing to "blow away and pray" to begin with.

This is only relevant because I pay for premium. If I did not, I could just make a new account, try out the import, and be done. But because I have premium and heavily use tags, I am unable to really test.