I'm excited about this MPL licensed tool and wanted to share; it's aiming to be a replacement to Notion, but self-hosted. It's not as feature rich (still in Beta) but it's a modern KMS/Collaboration tool that's looks to be on par with other proprietary options in the market. They seem to have some sort of capital backing because they have a team working on development. My concern is how the pricing model will work and what features they will lock. They say that it will be free to self-host, but I feel like they will lock some features (most definitely their cloud service.) But if they only lock cloud hosting but allow self-hosting it will be pretty amazing for the self-hosting community.