When Reddit replaced Digg, it was because Reddit was trailing Digg closely in the shadows. Specifically, Reddit was already successfully grown, well featured, reasonably scalable, merely ranked #2 in public perception and numbers. Digg made multiple critical mistakes, and Reddit was ready to accept the thrown.
Reddit has made some critical mistakes, also has had a small number of long outages, but there is no powerful force lurking in the shadows.
The forces in the shadow of Reddit today usually have several terminal weaknesses. They won't be able to handle a 100x traffic surprise, both culturally and their servers, when a true exodus will probably be at least 1000x. They often exist for a single topic, which is frequently bigotry.
Reddit has made some critical mistakes, also has had a small number of long outages, but there is no powerful force lurking in the shadows.
The forces in the shadow of Reddit today usually have several terminal weaknesses. They won't be able to handle a 100x traffic surprise, both culturally and their servers, when a true exodus will probably be at least 1000x. They often exist for a single topic, which is frequently bigotry.
Best of luck to anyone trying.