I recently listened to a interview with Pieter Levels on the Arvid Kahl YouTube channel where Levels basically outlined why it died.
https://youtu.be/9Wjec3wh4p8?feature=shared
I feel like IndieHackers dot com is dead.
I was on this site 2017, when the engagement was at its peak.
Now, this thing is dead, and no one ever replies or engages here. They just want to promote, and promote more.