Some law firms still use fax machines. Not because fax is good technology. Because it's the only channel they trust not to leak.
When a business chooses a forty-year-old protocol over your cutting-edge AI platform, that's not ignorance. That's a design review you failed.
If your AI requires data to leave the building, you've already lost these clients. They won't tell you why. They'll just never adopt.
The test is simple: would a firm that still faxes privileged documents trust your system?
If the answer is no, the problem isn't their conservatism. It's your architecture.