Running on a Cloudbox has its own set of problems. Some projects need desktop GUI tools (particularly desktop apps themselves, but some may also want these for profilers / debuggers etc). Some projects need USB. Even if you don't need any of those, you need to figure out what to do about build caches, package manager environments, credentials / secrets, VPN config, shell customizations, and those are just a few things that come to mind.

I do like having a permanent, remote workbox, but am a lot less keen on the idea of ephemeral boxes unless you're a company willing to invest into that infra.