From a human performance and health point of view, yes, you need between 7-9 hrs of sleep a night. It doesn't need to be continuous or perfect, but good sleep

From a human performance and health point of view, yes, you need between 7-9 hrs of sleep a night. It doesn't need to be continuous or perfect, but good sleep is going to have a huge impact on your quality of life. In the short term, you can deal with the less, but your cognitive function, physical performance and metabolism are going to be impaired.