I can see why one would want to merge websites - one fewer Wordpress instance to maintain, if nothing else. I would guess hpmor.com passed the peak in terms of pageviews years ago, and it might make less sense to keep it as a standalone website now.
I wish redirects were handled more granularly, though. https://www.hpmor.com/chapter/1 should lead to https://www.lesswrong.com/s/PtgH6ALi5CoJnPmGS/p/vNHf7dx5QZA4SLSZb and https://www.hpmor.com/chapter/2 to https://www.lesswrong.com/s/PtgH6ALi5CoJnPmGS/p/6L523aJDpjm4yWxue rather than to the top page. Cool URIs don't change.
Also, it looks like pages outside of the main content were not transferred. e.g. http://www.hpmor.com/notes/
I can see why one would want to merge websites - one fewer Wordpress instance to maintain, if nothing else. I would guess hpmor.com passed the peak in terms of pageviews years ago, and it might make less sense to keep it as a standalone website now.
I wish redirects were handled more granularly, though. https://www.hpmor.com/chapter/1 should lead to https://www.lesswrong.com/s/PtgH6ALi5CoJnPmGS/p/vNHf7dx5QZA4SLSZb and https://www.hpmor.com/chapter/2 to https://www.lesswrong.com/s/PtgH6ALi5CoJnPmGS/p/6L523aJDpjm4yWxue rather than to the top page. Cool URIs don't change.
Also, it looks like pages outside of the main content were not transferred. e.g. http://www.hpmor.com/notes/