Most of the tech unicorns are like this. Zuckerberg caught lightning in a bottle one single time and everything they’ve tried since has sucked. Instagram was an acquisition. So were oculus and WhatsApp. By contrast their next in-house flagship was temu Wii avatars.

Amazon hasn’t built anything innovative since the Kindle.

Surely it’s a consequence of being publicly traded that these companies cease to be able to develop good novel products rather than acquire competitors or iterate on past successes.