The Arch Linux project has reached an important infrastructure milestone by making its official Windows Subsystem for Linux image fully reproducible.
In simple terms, this means that the image is now built so that it produces exactly the same result every time. If the image is rebuilt later using the same source, it will be identical down to the last bit.
For everyday users, the benefit is mainly about trust and reliability. It becomes much easier to verify that the image you download has not been altered, tampered with, or accidentally changed during the build process.
I use arch btw
Lots of software has non-reproducible build artifacts due to e.g. timestamps being inserted, or due to non-stable algorithms being used during compilation. They presumably managed to remove all sources of randomness from the image they build.