Actively developed is different from “maintained”
OpenOffice (OO) is being maintained and shouldn’t be used
LibreOffice is being actively developed and should be used as a replacement to OO
Legacy softwares such as X11 and OO get updates to fix vulnerabilities
You prob said as irony, so used this opportunity to promote LibreOffice :)
https://www.libreoffice.org/discover/libreoffice-vs-openoffice/
Thought Thunderbird didn’t have an Android client, always knew about K-9, but never connected the dots /facepalm