If you sell B2B SaaS, sooner or later a bigger customer's security review asks: can you guarantee our data is never in the same database as another customer's? If you're on shared tables with RLS, the honest answer is "we filter by a customer_id," and that does not pass the review. I've watched that one question stall deals. The clean fix, a separate database per customer, usually means hand-managing provisioning, migrations and connections across all of them. And most managed options ...