Author and computer science professor Cal Newport has written about the benefits of working on very cognitively demanding tasks in a mode of no interruptions or distractions, and progressively building the mental muscle to operate in such a mode.
He calls this "deep work" and has written about it in detail in his 2016 book of the same name: https://www.amazon.com/Deep-Work-Focused-Success-Distracted/dp/1455586692 . He emphasizes the increasing importance of such work in the knowledge economy.
Are there any companies or startups that allow their employees to work in this manner? Has this led to a different way of identifying tasks, structuring them and setting up the work environment?