I've had to deal with google's review process for docs add-ons and play store apps. It was a demotivating experience, disrespectful, inhumane and unfair. The idea that this will be the only way to be allowed to create things for android is so depressing. Putting hundreds of hours of effort into an app to hear back a vague "does not comply with some rule" is such a let down. This has been my main motivation to degoogle.
In chat on the iphone, ios users see fellow ios users with blue bubbles, but see android peasants with green bubble. There's social pressure to "be blue like everyone else" and the author caved in.
Trello has been existing for years, it's a very flexible way to organize information. Markdown isn't new either. I'd say there's a trend to simpler software that works locally, but that might simply be my bubble.