I've heard the opposite, stories from users that MCP has been a flop. One of my acquaintances works in marketing and is a heavy LLM user. He got swept up in the hype of MCPs and tried a bunch of them out. He was expressing his disappointment and frustration.

It is a drawback of hype and early adoption. I think highly technical users can get value out of it for now and can keep their expectations in line. If I am building my own MCP server and it is a bit flaky, I manage that responsibility myself. If I am wiring up a MCP server that makes some claims of automating some workflow and it doesn't work, then I negatively associate that with the very idea of MCP.