Spotify's design team writes about design systems, localization, Figma workflows and designer careers.
HN commenters list it among design and UX blogs they follow, and cite its design systems post for Spotify's dark interface history.
Here is a handful of blogs I follow on Design/UX/Product:
- https://spotify.design/
- https://thedsgnblog.com/
- https://eyeondesign.aiga.org/
- https://www.creativereview.co.uk/
- https://alistapart.com/ - One of the favs.
I think one of the older iOS apps wasn't light-on-dark, but for a very long time, yes.
https://spotify.design/article/reimagining-design-systems-at-spotify