I loved OpenOffice.org back in the day, but in today's world with no modern web collaboration option it is dead. I'm aware of the attempts to make it run via browser, and no, they aren't really there, not even close.
What we need today is a web-first suite of apps that does everything Google Docs/Spreadsheets/Slides do, but uses OpenDocument family of standards as their native file format.
It isn't dead because it can still be used for many use cases. I write many documents in LibreOffice Writer and I regularly use LibreoOffice Calc for financial calculations. Also, LibreOffice Calc is a stupid name because it conflicts with the calculator in application launchers that search for substrings.