Sober is exclusively available on Flathub, whom published these figures in their Year In Review: https://flathub.org/en/year-in-review/2025
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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There's no way it has 100% market penetration.
No. Nothing does. There are about 1.4bn children over 5. Over 200m play per month. If you factor in economic information like those without devices, that's huge. One in 7 kids. In a class of 30, that's 4 players. Considering some countries will have low saturation, developed countries will have significant player population. It's huge. Unrivaled in gaming.