This is the best tl;dr I could make, original reduced by 88%. (I'm a bot)

Berlin, July 28, 2017 - The Document Foundation announces LibreOffice 5.4, the last major release of the LibreOffice 5.x family, immediately available for Windows, macOS and Linux, and for the cloud.

LibreOffice 5.4 adds significant new features in every module, including the usual large number of incremental improvements to Microsoft Office file compatibility.

Thanks to the efforts of developers, the XML description of a new document written by LibreOffice is 50% smaller in the case of ODF, and around 90% smaller in the case of OOXML, in comparison with the same document generated by the leading proprietary office suite.

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