The next evolution will be a shared build system. If the builds done by the developer can be cached and shared with the CI, CI's role is lessened to just a gat

The next evolution will be a shared build system. If the builds done by the developer can be cached and shared with the CI, CI's role is lessened to just a gate-keeper. Most of the time, the cache is already warmed up by the developer's build and CI is a noop. Imagine a CI that take 5 seconds to finish. For that to become reality, the build environment needs to be truly hermetic and reproducible, so that the cache can be trusted. Remote builders also help establish trust.