This comment does not explain why one should use Libreoffice if Openoffice is working just fine for them.
Does it still work? Sure... is it secure and has feature parity with modern offerings? Definitely not.
Perhaps that's fine - but since LibreOffice is also free and is actively developed (by many of the original OpenOffice team too), I don't see a compelling reason to not make the switch.
It is better not to need to think about that, much.