LibreOffice 4.0 is right around the bend and today Charles H. Schulz wrote why this particular version is "an existential release." Folks were wondering why the big jump in version numbers, but Schulz says there are two big reasons why the time is now. Besides the additions that will be seen by the users, his reasons go a bit deeper.
Schulz cites major API changes as one of the reasons why this is such an important release. Developers have been cleaning up code since the fork and clears the path for "deeper changes and a more powerful API." Schulz explains that even though this opens tremendous possibilities for developers (and thus, users), more than that it signifies that "LibreOffice 4.0 is becoming a different animal, and that comes with its own distinct advantages while clearly showing our ability as a community to innovate and move forward."
rest here