I came across sandstorm a few years back too -- so my mind was blown to learn workers and CloudflareOS are a better implementation of that project.
Cloudflare becoming FedRAMP High recently is a big deal in my little world. I'm trying to learn everything I can about it for our little AI consultancy.
CloudflareOS looks like the sandboxing piece I was just starting to put together -- agents and MCPs behind real security boundaries. Sandboxing is so damn important in this space and most of the other providers ignore it completely or just give it lip service. I think the workers concepts are going to supercharge way more than folks are giving you credit for (in the HN thread a few weeks back there were a lot of dubious folks -- I see it more like the Dropbox announcement).
I hope our paths cross at some point soon. I would love to get more understanding of CF and the roadmap for COS.