I’ve only been using Notion for about a week, but my cautious, reserved opinion is that it is #$@&% incredible. It seems to be the perfect combination of wiki, plain text, lightweight database, web/Mac/iOS app, and privacy and sharing that I’ve wanted for a long time. I generally don’t want to trust anyone to keep my data available, but the export options seem legit, and even the subscription price can be viewed as a way to make sure the platform sticks around. We’ll see.