Granted.

You can get this everywhere. Just track down the "Redirector" extension and put a rule in to redirect ^(https?://)?www.reddit.com(/.*)?$ to $1old.reddit.com$2

You can also use it to automatically redirect all mobile Wikipedia links to the non-mobile site.

By the way, you can declare your preference for "old" in Reddit's settings. It has worked pretty well for me on desktop (not sure if old even exists on mobile).

Personally, I can't stand that interface, but I also use a userscript to change "old" to "www" automatically, so I guess this wouldn't really bother me. I definitely recommend using the reverse userscript if you have the reverse opinion though.

Use a browser extension.

javascript:(function() { window.location.href = window.location.href.replace("www.reddit", "old.reddit"); })()

Are you asking a question, or is this the petition? (the question mark threw me off)

I wouldn't mind it, but I'd be curious what happens when reddit follows the inevitable course and obsoletes that interface along with i.reddit.com