Main reason would be that every dev must then remember to add/strip a prefix at some boundary around the DB, which I think would be pretty error prone. A more

Main reason would be that every dev must then remember to add/strip a prefix at some boundary around the DB, which I think would be pretty error prone. A more minor benefit maybe is that they're natively presented with the prefix in the DB, so eg communicating with non-technical team while running SQL queries doesn't involve constantly adding/removing prefixes...