If they ever remove old Reddit they're done. So many communities use it exclusively and will just walk if forced into the new shite.
I wonder if offering different experiences for what is the same site is actually working out better in practice than we'd expect. That contradicts what we seem to know about site design and would be considered uneconomical, but might it help Reddit keep a broader set of communities? I'm not sure how we'd know this externally, but perhaps someone here has some insights.
Great for mindlessly scrolling images, but less so for content that you pick and choose what to view, text based content, and commenting. I think it'll come back to hurt them in the long run.
By the time New Reddit was launched old reddit wasn't even the primary way to view the site anymore. Nowadays new reddit crushes old reddit. Reddit doesn't need it's old users, it doesn't need you, and it doesn't need me. It could kill off old reddit today and it would be fine.
I doubt they tell their friends about it either.
They are too busy posting on Reddit.