AI collapsed the cost of building software and raised the price of renting it. Those two facts point in opposite directions, and the gap between them is where owning your tools stops being ideology and starts being arithmetic.
Every SaaS has an export button and the law says it must. What comes out is a folder of CSVs with the relationships stripped out, which is why the export button has never once stopped a price rise.
Agents can read your files and call your APIs, but every session starts blind. No customers, no history, no system of record. The gap is a missing backend.