Not an SRE, but I think the main contribution from this book was to popularize terminology of operations (eg SLAs) and to give an opinionated perspective on how

Not an SRE, but I think the main contribution from this book was to popularize terminology of operations (eg SLAs) and to give an opinionated perspective on how to handle operations at scale. More practically, I don’t think the book is as useful, as it generally only makes sense when you reach a certain scale that few organizations ever do (imo). However, we are heading into a future where computing will be everywhere and sensors in everything so in maybe a decade even the “smallest” of organizations may be responsible for large scale distributed systems and operating that would require concepts that are provided in the book.