Using linked records between collections is a pain if the record doesn’t already exist. With something like airtable you have the ability to search existing records or add a new one if it doesn’t already exist. This would be handy when adding items directly to the database and also in forms.
As an example I’m using a linked record to a zip code database for users to tell us where they are but that means I have to manually load all zip codes into the collection. It would be nice if they could add their zip code if they dont find it.