In 2010, Oracle bought Sun Microsystems, which held the trademark for the OpenOffice.org project. The open-source community that developed OpenOffice.org was worried that Oracle would do bad things, so they set up a non-profit, The Document Foundation, and established the LibreOffice project. Most of the outside contributors moved over to contributing to LibreOffice instead.

A few years later, Oracle donated the OpenOffice trademark to the Apache Software Foundation, which is why Apache OpenOffice now theoretically exists. But yeah, it hasn't seen a non-bug-fix release since 2014. You simply want to use LibreOffice at this point...

the same way a healthily developing young person compares to their parent in the paliative care ward, whose religious relatives won't agree to turn off the respirator because "look they still have a heartbeat".

OpenOffice is ancient and isn't really being developed anymore. It's in maintenance mode and hasn't gotten a real update in over a decade from what I can tell. Libreoffice trumps it in every way.

That said, I prefer OnlyOffice these days. It's a lot slower unfortunately (running on electron...) but it's much closer to MS office and has better document compatibility.

LibreOffice is awesome. OnlyOffice is pretty good too, and it integrates well into Nextcloud.