This is definitely a departure because when I subscribed to Kagi a couple months ago, all of my Google results for similar searches were SEO spam blogs filled with Amazon affiliate links that look like they had just sucked some Amazon reviews automatically into some poor facade to generate affiliate revenue.
These results were a surprise to me. Not sure what changed.
I imagine what changed is that Kagi started getting traction on site like here and some managers at google actually did something about it.
My own test "voynich illuminated manuscript" which used to give nothing but pintrest spam on google. Now there is just one result from pintrest in google and pretty much every result in Kagi is from pintrest.
There is an academic tab which seems interesting. I will give it a try later.
https://blog.kagi.com/kagi-features
If you prefer LLMs to Googling, then at least consider "phind":