In my opinion it is the perfect game. Games are fundamentally about competition, pitting the player against a series of evolving challenges that force the player to learn and adapt. It is a pure shooter, there are no hidden or obscure mechanics that exist in games such as DOTA or Valorant that force the player to understand and exploit a near-infinite number of combinations of abilities or skills. CS is about strategy and pure mechanical skill. Developers need to understand this, the narrative and storytelling elements in a game will always be inferior to films and novels. The primary focus of a game should be on the core gameplay loop, and building a series of challenges for the player to overcome. Multiplayer games such as PUBG, FIFA, etc are perfect for this model, as almost all of the "content" is user-generated. CS exists as all those games combined in their purest form, a 5v5 arena with a clear objective. There is room in the industry for more gimmicky games like Overwatch, Fortnite and LoL, but CS will never die because it already solved the formula for the perfect video game (20 years ago!), everything else is fueled by marketing and social-networking effects.
And it runs natively on GNU+Linux.