Single processor systems have been the backbone of computing for many decades, but in recent years they have been replaced by multi-processor systems for tasks requiring higher levels of computing power. While it may seem that multiple processors have become the only option for intensive applications, single processors still have several advantages that make them a valuable option in certain situations.

Single processor systems are often the cheapest option, since they include just one processor instead of multiple. The cost-effectiveness of single-processor systems makes them ideal for those on a tight budget who require basic computing power. Additionally, single-processor systems are much easier to set up and maintain than their multiprocessor peers. This means less time and money can be devoted to costly setup efforts, and the systems are often simpler to diagnose and repair if necessary.

Single-processor systems also consume less energy than multi-processor systems. As more processors are added to a system, the power requirements increase. This means that, for certain tasks, single-processor systems can be more efficient and may be a better option for environments with limited power.

Most single-processor systems also support virtualization, allowing multiple virtual machines to be run on the same system. This provides the ability to test and develop code in different environments within the same machine, which can be especially useful for those developing software or configuring servers.

Finally, compared to a multi-processor system, a single-processor system provides a much simpler system architecture, which can make troubleshooting issues much easier. The fewer processors and associated hardware mean that tracking down any problems or incompatibilities is usually much more manageable.

Overall, single-processor systems offer a great deal of benefits that should not be overlooked. They are usually the cheapest option, more power-efficient, can be easier to configure and maintain, and provide the ability to virtualize multiple applications. While there are definitely times when a multi-processor system is the best option, a single-processor system can be the ideal choice in many situations.