I am the lead engineer on Cloudflare OS (and Cloudflare Workers).
I am also the creator of Sandstorm.io.
And I'm the one calling it a successor. Wasn't some marketing decision -- that's directly from me.
Honestly really interested to know why you feel this isn't accurate.
FWIW, I didn't choose the name Cloudflare OS -- but I did frequently describe Sandstorm as being an OS, back in the day. Sure, it layers on top of Linux, but it's an environment where you install apps and run them, with the platform managing the execution environment, permissions, resource management, etc. That's sort of what an OS does. Cloudflare OS does all that as well.
As for the name, yeah, not really a fan as I noted above.
> the AI cannot introduce a significant security bug
https://news.ycombinator.com/item?id=49183266
That suggests running your own apps, which is a different thing.
But Cloudflare OS also supports a concept of "blueprints", where, once you've built your app, you create a "blueprint" (a copy of the code) and share it with others, from which they can create their own instances of the app. So it is still very much about sharing apps and running other people's apps, and the sandbox makes this safe and compliant even if you're not sure the app developer knows what they're doing.