Just like I saw with protocols like ActivityPub and IPFS, what happens is the developers of these protocols do a couple of reference implementations in their favorite languages, which work, but then when they write the actual "spec" of what they think they did in the code, they never get it fully correct, or even if they do it's messy, incomplete, or not kept up to date.
So as long as you're a developer working in one of those two languages you just take their code and run it, and all is fine. However for someone coming along trying to implement the protocol in a brand new language, it gets discovered that the protocol is insufficient and horrible and attempts to build based on the protocol are therefore doomed to fail.
I'm not saying MCP has already reached this level of chaos, but I'm just saying this is the failure pattern that's fairly common.
So as long as you're a developer working in one of those two languages you just take their code and run it, and all is fine. However for someone coming along trying to implement the protocol in a brand new language, it gets discovered that the protocol is insufficient and horrible and attempts to build based on the protocol are therefore doomed to fail.
I'm not saying MCP has already reached this level of chaos, but I'm just saying this is the failure pattern that's fairly common.