This disregards the business model behind the companies. There are no transactions for wikipedia or hacker news.
Both AirBnB and Reddit are incentived to collect a massive amount of data on their users and to maximize the experience in any way possible. They need the data to understand user behavior and feed it back into the recommendation algorithms. For both hospitality and social media, users look for images/video content since it is much more powerful than text for most people. All of their competitors have equally bad performance for similar reasons, so they don't lose a competitive edge.
Hacker news specifically goes for a retro look with an interface that has not changed significantly in decades. Wikipedia simply doesn't have the money or engineering capacity to support a more robust platform like airbnb or reddit.
Both AirBnB and Reddit are incentived to collect a massive amount of data on their users and to maximize the experience in any way possible. They need the data to understand user behavior and feed it back into the recommendation algorithms. For both hospitality and social media, users look for images/video content since it is much more powerful than text for most people. All of their competitors have equally bad performance for similar reasons, so they don't lose a competitive edge.
Hacker news specifically goes for a retro look with an interface that has not changed significantly in decades. Wikipedia simply doesn't have the money or engineering capacity to support a more robust platform like airbnb or reddit.