I turned off the Internet by default on my home LAN and made it on-demand only. Like we used to do it. It's nice. I don't know why I didn't think of this sooner.

Related, Kiwix has become my favorite thing of late. Offline wikipedia, guides, project Gutenberg, and searchable forum dumps like gardening, locally hostable:

https://kiwix.org/en/

Kiwix - Home

Kiwix is a nonprofit organisation making free knowledge accessible where the Internet is not. We create and support open technologies that bring the world’s knowledge Offline via our own open-source software dedicated to providing offline access to free educational content, and more…

Kiwix