I believe there is. All about 150 submissions of the last month had the 'old.' in the URL.

This is a joke, but yes old.Reddit still exists. I use it, and if it goes away I’m likely to stop using Reddit at all. It’s so much more information rich than the new design.

I think HN changes the URL to use "old.reddit.com" instead of "reddit.com"

But why? I know some people feel nostalgic about this but the old version IMHO isn't really better.