AWS employs innovative techniques such as deterministic simulation testing to ensure systems correctness in their distributed infrastructure. This involves running a distributed system on a single-threaded simulator to gain control over non-deterministic aspects like thread scheduling and message delivery order. By implementing these practices, AWS can reproduce specific failure scenarios, which helps in identifying bugs and improving system resilience. User comments highlight that 92% of catastrophic failures relate to nonfatal error management, emphasizing the importance of addressing these potential failures correctly. Some users express a need for easier entry points into complex tools like TLA+ and P, suggesting that practical examples could enhance understanding and adoption among developers.