Nextcloud, Ionos and other partners are developing an open-source office suite under the project name „Euro-Office“ as an alternative to the market-dominant Microsoft Office.
The two partners are not starting from scratch, but have forked the components of OnlyOffice available as open-source code and want to build on them. In the summer, the software is then intended to replace the previous office component Collabora in Nextcloud and the Ionos Nextcloud Workspace. A ‘technical preview’ is already available on GitHub.
While this is a good news, I think they should move from github, you know microslop copilot…
Old isn’t necessarily bad, unless years of decision-making have left it in a massively complex state (see also: Xorg)
The real reason here is that LibreOffice is written in C++, which is falling rapidly out of fashion for modern apps, leading to a smaller supply of developers.
Contrast this with Onlyoffice. Yes, the document engine is still written in C++, however the build tools use more modern items like python and onlyoffice supports having Javascript frontends and scripting, making it easier to source web devs to work on these parts.
I am not sure if this is the real reason. C++ is still a very valid option. People used to low level languages can rather easy switch the language they are writing in.
Maybe one day we will find out the real reason.