I think there are a few more URL patterns to account for. These were tested on Safari 16.6 (18615.3.12.11.2) on MacOS 13.5 (22G74) with Userscripts for Safari Version 4.4.3 (74) in an incognito window. Here are some examples, but I tried a few additional links with the same results.

https://i.redd.it/zv02loj5yejb1.png

redirects (very strangely!) to

https://old.reddit.com/r/funny/comments/media/nice_hat/?url=https%3A%2F%2Fi.redd.it%2Fzv02loj5yejb1.png

I wonder if that /r/funny post is something to do with my browser or if it's a reddit quirk? (That's why I was using incognito, to hopefully rule out anything on my end.) It seemed like all i.redd.it links redirected to that same post.

Also,

https://www.reddit.com/gallery/15wdvhr

redirects to

https://old.reddit.com/gallery/15wdvhr

but with a page not found error. I don't think there's an old.reddit.com equivalent for these gallery pages.

Thanks for your work on this userscript!

Replacing the current UserScript metadata block with this will make it possible for userscript managers to automatically check for and install updates (only other change is @version being iterated):

// ==UserScript==
// @name        Old Reddit Redirect
// @version     0.1.2
// @description Redirects you to old.reddit.com
// @author      github.com/richkmls
// @match       *://*.reddit.com/*
// @exclude     /^https?://[a-z]{2}\.reddit\.com/*
// @exclude     *out.reddit.com/*
// @exclude     *://*.reddit.com/gallery/*
// @exclude     *://*.reddit.com/media*
// @run-at      document-start
// @updateURL   https://github.com/RichKMLS/Old-Reddit-Redirect/raw/main/oldRedditRedirect.user.js
// @downloadURL https://github.com/RichKMLS/Old-Reddit-Redirect/raw/main/oldRedditRedirect.user.js
// @grant       none
// ==/UserScript==

On the topic of quality-of-life stuff:
A lot of userscript managers quietly peek at JavaScript documents opened for viewing within the browser to see if they start with a userscript metadata block, evaluating them further and prompting the user for an action to take (including installation) if so.¹

To take advantage of this, the installation instructions could be revised to specify a preferred method (instructing readers to simply click a link leading to the raw version of the script) followed by an alternative/fallback method (the current one involving copying and pasting the code).

Reddit has a "no participation" old-style subdomain that needs to be excluded:
// @exclude https://np.reddit.com/*

But apparently, there are more such domains (incomplete list).
So actually it might be best to exclude any 2-character-subdomain.reddit.com

Hi, first of all, thanks you for your fine work, did me a favor a couple of month now, work perfectly without error.
Until today, when reddit keep returning to new layout causing reload, it cant load page unless disable the script, after disabled, the site load the newest layout, then i enabled again and refresh how many is ok, but not as first time.
Step to reproduce:
Use violentmonkey on Chrome/Edge
Rewrite reddit.com to new.reddit.com
open a new reddit tab
Problem
Disable, reload, page load OK
reload the same tab, OK
Open new tab, Problem

Here is your script modified to the newer layout:

Thanks for your time!
Sincerely.

Hello,

I have this script installed in Adguard on Android. Sometimes I use the reddit app, sometimes I view reddit in Chrome, which is when this script becomes handy.

I have a problem when using the app: when I click a link to an external site it doesn't load it, it just stays on a loop trying to load the page. It's stuck looping on "out reddit.com". When I disable the script there's no problem.

I know my use-case is probably odd because I'm hopping between the app and Chrome. But if you can offer any assistance I'd appreciate it.

Thanks!