Proton hack won't be acceptable upstream
I learned that Wine and wine-staging doesn't like app-specific code. However, Proton has [a lot of app-specific workarounds](https://github.com/ValveSoftware/Proton/blob/1a73b04e6cdf29297c6a79a4098ba17...). Since Microsoft [famously](https://arstechnica.com/gadgets/2022/10/windows-95-went-the-extra-mile-to-en...) has app-specific workarounds (which Wine needs to emulate for full conformance), our own workaround for Microsoft Office wouldn't be much different on the technical side. On the social side, Wine wouldn't accept stuff like that, but Proton has a history of this.
Proton already has a hack for this issue.