As noted by others below, this has nothing to do with GUI desktop applications.
Sure, systemd is involved in running the system on which those applications run, but the discussion was about some sort of equivalent to the unified GUI stack offered by macOS (the Core* frameworks) which are used by essentially every GUI application on that platform. Linux doesn't have that, and there's nobody in a position to force that on developers. systemd has nothing to do with this.
Sure, systemd is involved in running the system on which those applications run, but the discussion was about some sort of equivalent to the unified GUI stack offered by macOS (the Core* frameworks) which are used by essentially every GUI application on that platform. Linux doesn't have that, and there's nobody in a position to force that on developers. systemd has nothing to do with this.