Why doesn’t the open source community organize around projects that are just as far? Chrome and Safari were based on open source projects like Konqueror, Webkit

Why doesn’t the open source community organize around projects that are just as far? Chrome and Safari were based on open source projects like Konqueror, Webkit, Chromium and Blink. They do 90% of the heavy lifting. Want an open source facebook / twitter? Here you go: https://qbix.com/platform https://qbix.com/platform