Did they show the same news as everyone, but later? That seems like it doesn't fully leverage the format. The format seems like it would be good for things that are subtle and got overlooked at the time. But I guess maybe the normal news cycle can surface those same things when they reach a breaking point.

It's been several years (and the issues are in my office so I could take a look later) but I recall it was a mix. They'd sometimes group big stories together thematically (like when all the billionaires were starting to get into space) but also do longer-term reflections on single, complex stories like the Salisbury Novichok incident.

I don't recall it really surfacing things that didn't make the news cycle, but one thing I failed to mention is they had (have?) really good infographics/visualizations! They have a lot of the more recent ones here https://www.slow-journalism.com/filter/infographics