Chess is the longest-running game still gaining strategic discoveries. The current era — post-Magnus, post-AlphaZero, post-Queen's Gambit — has more amateur engagement than at any time since 1972.
Chess.com regularly hits 17 million daily active players, which is more than every modern hobby game combined. Modern online platforms (Lichess, Chess.com) have transformed the learning curve with free engine analysis, free puzzles, and adaptive bots.
The skill ceiling is unbounded — 1500 years of theory and counting. Most players who go past 2000 ELO say chess teaches more about how they think than any other intellectual activity.