I'm currently using LibreOffice but I was thinking about going back to MS Office 2007 Ultimate, which I got at a great student discount back in 2009 when I was a college student. This is a retail licensed copy that was purchased as a digital download, and not student/educational licensed version. Will MS Office 2007 work without issues in Windows 11? I right now I don't have a DVD drive installed in my PC and my case does not support 5.25" drives and I burned my digital copy of MS Office 2007 to a DVD-R back in 2009 and I have the activation key stored with it. Is it worth buying a portable DVD drive and going back to MS Office 2007 or should I keep using the latest mainstream version LibreOffice? Will cross-platform format compatibility suck anyways between working with files created with MS Office 2007 and opening them up in MS Office 2021 or MS 365 and vice versa because of how old MS Office 2007 is?