Modern revisions including “contingency theorists” argue that Theory Y is not essentially a progressive alternative to a dull Theory X.
Challenges and Limitations of Theory X and Theory Y:
McGregor’s interpretations characterized his subjective explanation on the world around him. They were not the consequences of investigation or research. They have been applied to decision-making practices rather than to further the conclusions of research work.
The major distinct disadvantage of Theory X and Theory Y is that they are put forward as challenging sets of assumptions — a supervisor is either motivated by Theory X or by Theory Y.
However, modern revisions including “contingency theorists” argue that Theory Y is not essentially a progressive alternative to a dull Theory X.
Both sets of assumptions may be effective, depending on the environments of the circumstances.
However, the main conclusion that McGregor pulls from his effort is that Theory Y is a much more accurate depiction of human behaviour, and for that reason Theory Y management approaches should be implemented.