How is the KiCAD format more open than LibrePCB? Both are custom formats using S-expressions.
The thing is that while the files look similar superficially, LibrePCB has a lot of differing library concepts: https://librepcb.org/features/library-concept/ Just as an example, LibrePCB has UUIDs for _everything_. That makes conversion from/to KiCAD more difficult.
The thing is that while the files look similar superficially, LibrePCB has a lot of differing library concepts: https://librepcb.org/features/library-concept/ Just as an example, LibrePCB has UUIDs for _everything_. That makes conversion from/to KiCAD more difficult.