Sure, they might still find themselves in highly regulated industries where risk avoidance trumps innovation everyday, all day.
MCP is for _the web_ , it started with stdio only because Anthropic was learning lessons from building Claude Code.
Author also seems to expect that the result from MCP tool usage will feed directly to an LLM. This is preposterous and a recipe for disaster. Obviously you’d validade structured response against a schema, check for harmful content, etc etc.