Lately, when I'm looking for answers and my googling gives me a Reddit link, I pull up the actual reddit page in The Wayback Machine. Admittedly my sample size is small but it hasn't failed me yet.

Some day, though, if Reddit goes down completely or otherwise becomes unavailable to search engines, it will be much harder to find Reddit content by Googling for it.

The other thing I think is a hidden gem of useful info on Reddit is the wikis. It seemed that even sites like Libreddit (when it worked) didn't provide access to those.

There is The Archive Team. They still seem to be actively archiving Reddit (probably via web scraping, not any particular API.) I'm not sure if/how the results of Archive Team scrapes are made available to others, though.