Yes, Flutter is “sponsored” by other money making teams inside Google. It is why resources have been spent on Flutter for Web, which no one asked for - the Ads team essentially bought the feature for their usage. This was also how React Native got its start in Facebook.
So my read of Flutter is it’s a way for talent to “ship and get promoted” inside Google or to support other Google product teams. Everyone else is a secondary priority.
Atlassian's Confluence (Cloud). A showcase for the decline in web based software forced by the move to make everything a SPA. A terrible new editor experience. Slow JavaScript heavy page loads. No persisted markup editing.
Yes, a common reaction, until newbies (like myself) find configurations like Doom Emacs and Spacemacs and come to realize the opposite. For myself it's only missing a slightly better "rending experience" like VSCode.
I could see both working well when depending on the situation and audience. In my role I'm seeing a need for plain diagrams that need to be kept up-to-date and a "pretty" diagram for showing the bosses for 30 seconds in presentations.
I've been looking at draw.io and PlantUML - what has worked well for others? draw.io is much easier to get into, but I can see declarative diagrams making maintenance easier for long-lived docs.