- Acer Switch Alpha 12 - Intel NUC - Google Pixelbook
Its build by Google so im not sure it will get mainstream or just killed. But calling it "nothing OS" is big understatement, When was the last time a new OS from scratch was created? or if we comparing it to linux/Windows/Mac Im sure a lot people work on these
https://fuchsia.googlesource.com/docs/+/refs/changes/56/1013....
"In 1988, when the project first began, the team comprised about 20 engineers. By the time the first version of Windows NT shipped five years later, the team had expanded to about 150 engineers as it battled constraints and tradeoffs."
https://news.microsoft.com/features/the-engineers-engineer-c...
But I think comparing these team sizes is not very meaningful without at least a cursory look at what is part of the project and what isn't. Is it just the kernel? Does it include an entire graphics pipeline, a UI toolkit, a network stack, device drivers?
On top of all the sibling comments, Redox (https://www.redox-os.org/) & TempleOS (https://en.wikipedia.org/wiki/TempleOS)