Hi @ashton314 ,
This is a great point, and why we built this feature: https://help.kagi.com/kagi/features/redirects.html
While we would love to eventually build some domain-specific indexing around programming docs, for now we need to rely on upstream indexes, and often they give pages that lag behind like this.
For now, we can't become domain experts on every language and keep them all up to date (assuming they even serve docs pages that let you do a "latest" type thing), so we give that power to users to touch things up.
As we ramp up our in-house indexing operations, this is top of mind. For now, if you need any help setting up the URL rewrite, let us know!