What is a technology that is more than 100 years old and still not embraced by firefighters?

One technology that is over 100 years old and still not widely embraced by firefighters is the use of drones for firefighting operations. While drones have been utilized in various industries since their inception, many fire departments remain hesitant to adopt them due to concerns over regulatory issues, the need for specialized training, and the integration of drone data with existing firefighting strategies. Despite their potential for aerial surveillance and real-time situational awareness, the full operational integration of drones in firefighting is still a work in progress.