I said large, not huge :P
I'm afraid I don't want to dox myself so I can't post publicly stuff from my employer. And I don't really have time to do what ask and write it up in my free time.
I doubt something the size of reddit would run properly on Python, but I think both mine and the commenter I replied to had the point that most sites on the internet WOULD run fine without all the bloatware and overengineering complexity. Very very few sites have the traffic that reddit does. Most websites belong to the long tail, and for those almost any tech stack would work - so why choose a needlessly complex one?