Is it really that low an impact? A lot of the work performed in CI is duplicated (`apt update && apt install texlive-full` f.ex.), and thus there'd be a benefit to running it less often.
Consider also https://openssf.org/blog/2025/09/23/open-infrastructure-is-n... :
> Automated CI systems, large-scale dependency scanners, and ephemeral container builds, which are often operated by companies, place enormous strain on infrastructure. > These commercial-scale workloads often run without caching, throttling, or even awareness of the strain they impose.
...which implies that the load isn't negligible.