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Updated Background Apps Design
(feddit.nl)
The GNOME Project is a free and open source desktop and computing platform for open platforms like Linux that strives to be an easy and elegant way to use your computer. GNOME software is developed openly and ethically by both individual contributors and corporate partners, and is distributed under the GNU General Public License.
Okay so apparently I partially misunderstood and not all current systray implementations are unsafe. Some are, but the biggest reason is that it's all a mess, pretty well explained in this reddit comment: https://www.reddit.com/r/gnome/comments/172wftq/why_no_system_tray_by_default/k3zg58t/