This is going to be a marathon. Not a sprint. It’ll take multiple years and many Lemmy improvements to kill Reddit.
What we can do however is raise awareness and even if things are slow and from time to time we have to use reddit for whatever reason, we might want to foster a soft pledge, commitment or intention of not posting any new content on reddit.
It does not matter if Reddit has millions of users if the actual content creators and skilled moderators are dropping off.
I can’t post anything on reddit because I no longer exist on reddit. (×_×)