They may offer some benefit as there is some evidence that pumps can enhance muscle growth through direct and indirect means.
At the same time they may hamper the total mechanical tension you can put a muscle through since they stop you being able to do longer sets (lactic acid and blood builds up too fast), these are my thoughts (tojust a theory).
Also, my above theory may be negated since there's evidence that hypertrophy may be more about total 'difficult' sets as volume rather than sets × reps × weight. As mentioned in this article.
The New Approach to Training Volume • Strengtheory