(forked/adapted from comments in T53736)
The UX of section-redirects (#REDIRECT [[Foo#Bar]]) is broken in multiple ways. For example, the "redirected from" text is at the top of the article, but when section targeting works the user does not see that message. We might want to look for a more innovative solution.

Quick current-UX summary:
When you visit a page via a redirect, we display the target page with a small notice (screenshot) below the title (so the user understands how they ended up here after clicking on a different title)), and we use JavaScript to update the URL to that of the target page (so that if they copy&paste it then future readers will go directly to the correct target).
When the redirect points to a specific section of the larger article (e.g. https://en.wikipedia.org/wiki/Camden_Market_Fire which is a redirect to [[Camden_Market#Incidents]]), we use JavaScript to scroll to the target section.

This has a couple of problems:

1. with JS, the user never sees the redirection notice and might not understand what is happening. (It doesn't help that sometimes the connection between the redirect and the target section is not obvious.)
2. without JS, the user sees the top of the article (with the notice, but it only tells which article they were redirected from, not the target section). (This should be get fixed via T53736)