It would have happened more slowly at least, delaying the increase in populism, nihilism and depression in the Western world, the anglosphere in particular.
What traits specific to Reddit as opposed to a hypothetical generic alternative forum platform do you think are major contributors to those social trends?
Recommendation engine pushing users into ideological bubbles, public voting mechanism creating incentive for conformity which then creates purity spirals, lack of moderation.
Early Reddit had a recommended tab, but that didn't last long. The current recommendation features are relatively recent - this decade at least.
It would surprise me if the winner in that space didn't have a public voting mechanism. Digg, Reddit's early major competitor had one, and heavy-handed moderation surrounding the HD-DVD decryption key leak was one of the major inflection points that drove users from Digg to Reddit. Stricter moderation during that time period would have been a losing strategy.
