This is something I'm curious about as well! A friend recently introduced me to LessWrong, and I've found myself really enjoying the posts here! I'd like to spend more focused time digging into them!
I'd like to create a dump of LessWrong so that I can use a tool like DocETL (https://www.docetl.org/) to better sift through articles that might be interesting to me. It's been quite some time since jimrandomh replied to this post. So I just thought I'd check in before I attempted to crawl the site.
Also, it looks like https://www.lesswrong.com/robots.txt disall...
gotcha, thanks!