Earlier quoted context omitted.
At least some on both sides of the LibreOffice/OpenOffice split hate each other with the heat of 10,000 suns. There will be no reconciliation.
Why is that? What has fueled this divide?
It appears that the original developers of StarOffice, who then moved onto OpenOffice.org, did not have a good understanding on how free/open-source development works. They were unwilling to open up the development to new people and often rejected even the smallest contributions. A well-known example was about source code comments in German. There were contributions to write them in English, however the developers were shooting down even such straightforward changes.
In addition, Sun Microsystems would still produce StarOffice, an installation package of OpenOffice.org with some proprietary components. The project managers (Sun Microsystems) at OpenOffice.org would put emphasis to the StarOffice features instead of increasing the community involvement.
Somewhere around 2006, IBM got a license from Sun to produce an office suite based on OpenOffice.org, called IBM Symphony.
After Sun Microsystems was bought by Oracle, the same situation continued for a bit until Oracle could not figure a way to monetize from OOo and pulled the resources.
The lure for an office suite is that Microsoft has MSOffice which is a cash cow. It makes a lot of money for them. Both Sun Microsystems and IBM wanted a piece of that money. The permissive licence would enable them to make money by packaging the open-source OOo with their own proprietary additions so that customers would be compelled to buy it.
What they did not understand was the an office suite is a very complex piece of software. Apart from developers, it requires additional skillsets to produce the final package.
Just like the Linux kernel is stuck to the GPLv2 licence, it makes it easier to get everyone to work together. IBM famously declared around 2000 that IBM loves Linux. They made and make lots of money on Linux, even if Linux does not have a permissive licence.
It is an issue of greed to go for a permissive licence. That is, you benefit from all the volunteer work and then you have the right to add your proprietary bits and pieces that differentiates you from the open-source version.
If IBM had the foresight, they should have accepted the way LibreOffice is taking over. Just like with Linux, IBM is using it to gain big contracts because they pay their developer to develop it and support their customers at the same time. IBM could have done the same with the office suite. But no, they wanted the whole pie and a few additional slices.