Asprin

The only thing missing for me from IPS is an app so people can get notofications instantly (about PMs, likes etc - that should be configurable like forum notifications). We have a webhook on discord for posts and stuff, but that's the most important missing thing that comes to mind which could help in community building for me.

And I know a guy who had hemorrhoids. He did not want to join hemorrhoids FB group. He has found a forum and was able find Dr. through it and got support from other forum members. Most of them did not want to use their real name there to some reasons 😉 

To provide some added perspective on content, which is key to attracting and retaining members, not all content is the same.  And you want to be strategic in your content.  
You can have content that is functional, emotional, professional, or social.  
If you're a community in the Inception stage, you need a lot of functional content. These are "hard knowledge" articles such as how to's, guides, expert advice, and other authoritative content.  Search engines and visitors love functional content.  But it doesn't keep the people.  That's when you want to start thinking about content that is emotionally disclosing (eg. "what was your biggest challenge?  How did you feel when X happened? What was your most embarrassing moment? Welcome new members this week, etc").  Emotional content is what makes people stay.  There's a psychology and strategy behind content, so you want to choose the right mix for your community's lifecycle.