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Old.reddit.com is fine until you follow someone’s link on reddit and it takes you back to the new reddit. Argh.

There are extensions (at least for Firefox, but I think Chrome has those too) to always redirect to old reddit.

You know what is better than extensions: Old Reddit Please

Works great in Violentmonkey/Greasemonkey.

You can also log in and set your preference to old reddit

That does not work in my experience.