Lemmy now is in many ways already the same as reddit is today when you consider social dynamics. This is mostly due to how all of social media using traditional formulas devolved into competition in unproductive cynicism.
Check out Tildes if you want to see how reddit was back then, it's the closest thing.
Half the reason I was on reddit was to engage in discussions, and that's largely lost if I'm just scrolling through an unfiltered news feed with no way to participate.