Microsoft introduced the "Office Startup Assistant" or "Office Startup Application" (osa.exe) in Office 97, it sat in the system tray and loaded the main office DLLs at startup: https://web.archive.org/web/20041214010329/http://support.mi...
OpenOffice.org (predecessor of LibreOffice) copied this feature, which they called "QuickStarter", I don't know exactly when, but no later than 2003: https://www.openoffice.org/documentation/setup_guide2/1.1.x/...
Microsoft made OSA made non-default in Office 2007, and _removed_ it from Office 2010: https://learn.microsoft.com/en-us/previous-versions/office/o...
Are they now bringing it back?