“Flutter apps can work on Android, iOS, Windows, Linux, and Mac OS, and the Flutter UI and rendering engine, included with every app, translates everything to the OS layer.”
The Oxford comma before “and Mac OS” means that one can’t easily discern the end of the list. If, instead, it read “…Windows, Linux and Mac OS, and the Flutter UI and rendering engine,“ one would know that the Flutter UI and rendering engine were not part of the list but a separate clause.
@leighelse@ThisCJ A tip I learned from an old subeditor when I first moved from writing news to features goes: “If you find yourself considering using an Oxford comma, you need to go back and think again about what you are writing”.
@billbennett@leighelse@ThisCJ I dunno. The coder in me, for whom lists with clear relationships between elements are very important, thinks that an Oxford comma is always right. I haven't yet seen an instance where it's inappropriate, although I'm open to examples.
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