I haven't read this paper, but for the "25" paper, it was a longitudinal study that stopped observing people at 25. The result "brain continues to develop up to at least age 25" was misinterpreted as "stops developing at age 25" by media & social media.

I have similar concerns about reporting on this paper - feels ripe for pop-sci misunderstandings.

All research is ripe for pop-sci misunderstandings. Always. But this study at least didn't have a cutoff for ages studied.