Ugh, deep links should be part of the path, and anchor should be where on the page to scroll. Very annoying slide software. If the content weren't so good I simply wouldn't bother.
They also could use the query part on the url rather than anchor.
Lastly statically hosted doesn't mean no URL rewriting, they could again catch links to parts easily.
The poor UX of these tools is just a lack of will, not a technical limitation.
Then again hacker news should probably not blanket delete the hash in URLs either.