The entire premise of the Stack Exchange network is that old content is still relevant, and doesn't collapse into a mass of goo.
Sept 12, 2020 in the Nineteenth Byte
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Stack Overflow
Q&A for professional and enthusiast programmers
Programming Language Design and Implementation
Q&A for designers and implementers of computer programming languages
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Code Review
Q&A for peer programmer code reviews
Web Applications
Q&A for power users of web applications
Area 51
Q&A for proposing new sites in the Stack Exchange network
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
GenAI
Q&A for GenAI enthusiasts and practitioners and those interested in learning more about using GenAI tools