Have you ever negotiated having the source code (etc) put into escrow, should the vendor abandon the product? Working in healthcare (electronic medical records

Have you ever negotiated having the source code (etc) put into escrow, should the vendor abandon the product? Working in healthcare (electronic medical records), that was a standard line item for our customers. Good thing too; after acquisition, our grandparent company's execs quickly found a new leprechaun to chase after, and our product died on the vine. Despite first mover advantage, great revenue, and pipeline of prospects, our tiny effort was less than a round off error to the grandparent (Quest Diagnostics).