I don't see how that is an example of ideological reasons, or how that contradicts what I said. It seems like exactly what I was saying -- GNOME, Ubuntu and XFCE all have their own separate APIs for things. I've seen that issue posted here and on reddit so many times and I never understood why anyone considers it any more significant than all the other times a random open source project removed a deprecated API or did an incompatible version bump. Yes, I get it, it's frustrating when upstream is a moving target, but that's exactly what he's saying. You can choose to follow the moving target or you can target a platform that moves slower.

And because I have to keep saying this, that is a non-issue now anyway. XFCE supports the new app indicator protocol, and since Ubuntu dropped unity their support for it is available as a standard GNOME extension: https://extensions.gnome.org/extension/615/appindicator-supp...