So, this is interesting, but much more interesting is the langchain stuff N8N has added to their latest release. Makes it seamless to add in an army of interns to your workflow.
You're right. The Langchain integration is great, but you need an extra account for it. But it is actually in the backlog to write a tutorial about whats possible with Langchain too.
fyi, a separate account should not be necessary any more as the functionality got integrated into the regular version and is so available for all users by default.