The doctrine of separation of powers is not considered irrelevant, but rather it is a fundamental principle in democratic systems of government. The doctrine aims to prevent the concentration of power in a single authority and ensures a system of checks and balances among the three branches of government: the executive, legislative, and judicial branches.
However, it is important to note that the doctrine of separation of powers is not without its criticisms and challenges. Some argue that in practice, the separation of powers may not always be clear-cut, and there can be overlaps and interactions between the branches. Additionally, the doctrine does not address the issue of power dynamics and potential abuses within each branch.
Furthermore, the doctrine of separation of powers may not be universally applicable or relevant in all political systems. Different countries and political contexts may have variations in the implementation and interpretation of this doctrine. Some countries may have a parliamentary system where the executive and legislative branches are more closely intertwined, while others may have a presidential system with a clearer separation of powers.
In summary, while the doctrine of separation of powers is a crucial principle in democratic governance, it is not without its limitations and variations in practice.