Imagine a user new to LO and AppImage lands on this page:
The page offers 6 types of downloads. I understand the difference between Basic, Standard, and Full, but would the new user know the difference between Fresh and Still? I for one have no idea, and I'm a developer and relatively experienced with LO and Linux. What about other types of users?
Similar to builds for Snap and FlatPack, Appimage picks up and builds project source.
Fresh and Still are conceptual descriptions for the parallel timed release cycle LibreOffice project operates on--there are always "two" branches in release, along with master branch and incremental for release branches that roll nightly builds.
Still (ex. "Stable") is the previous release branch, while Fresh is the current release branch with latest features and enhancements that possibly can introduce regressions.