Modern passenger jets have come a long way since they first took to the skies, with many of the older analog systems being replaced by digital technology. However, why have analog systems been abandoned in favor of digital ones? The answer is simple: digital systems provide a number of advantages over analog systems, including increased reliability, ease of maintenance, and improved safety. Digital systems also offer greater flexibility and allow for more accurate data collection and analysis. Despite these advantages, there are still some advantages to analog systems, such as their lower cost and simpler design. Ultimately, the decision to use digital or analog systems comes down to the specific needs of the aircraft, with digital systems typically being the better choice for modern passenger jets.