Finally.
I am running an MCP server gateway/registry (some of you may know Glama).
I cannot tell you what portion of our issues/bugs were due to the need to persist server state.
This change will allow us to offer a lot easier way for people to use Open-Source MCP servers.
Just ran some quick numbers. In our index of 62,726 Open-Source servers, ~18,000 have been pushed to in the last 30 days.
So about ~30% are actively maintained. That's a pretty big portion of the community.However, the new protocol is wire-incompatible in both directions. This means that many of the servers/clients will need to be refactored (not enough to just update the SDK). It will take time and it will be messy (despite SSE deprecation, there are still many servers and clients that are SSE-only). Honestly, a legitimate opportunity for MCP gateways (ours included) to become more valuable by becoming an interoperability layer between protocol incompatible servers/clients.