I've personally tried to forget that this terrible thing exists, but as people seem to be intrigued by it on Adminloop, I'll come back to it briefly:
It is essentially a Discourse clone with a slightly better theme, although NodeBB can beat it instantly, just like Discourse themes.
Beyond that. It's worse at every level. It's basically a me too.
He did not experience anything. I think you have to refresh yourself to get something out of it.
When you scroll down for more messages, Discourse loads the next block in the background when you need it. Instead, Flarum makes you wait 10 to 20 seconds for the next block to load.
Discourse remembers where you are on topics, which is extremely important for infinite scrolling software.
It is developed by developers who do not really know what they're doing compared to Jeff Atwood and his friends.
It is not audited by security experts and uses a basically insecure battery. I could probably come across security loopholes, if I wanted to watch.
The Kickstarter seemed to be someone who was trying to scam me. They tore Laravel's slogan and repeated it over and over, it was a bit shocking. In any case, it was canceled because no one gave them money.