I guess the block-based document editor field is heating up. With this tool's native iOS and macOS apps, I hope they either unseat Notion, or launch Notion into making native tools. Their web-based UI has extremely poor performance.
I had the same thought. Bear is in this category too. The only differentiator vs. Notion right now seems to be a native app, however. I'm going to give it a try and see if I like it though.