It has survived for decades because it teaches you the fundamentals brutally well. Once you understand the 741 via this book, learning a modern Op-Amp is just a matter of reading a datasheet.
If you are an Electronics and Communication Engineering (ECE) student in India or a budding circuit designer, there is one book that has likely been on your syllabus reading list for decades: "Linear Integrated Circuits" by D. Roy Choudhary and Shail B. Jain. Linear Integrated Circuits By Roy Choudhary Fourth Edition
⭐⭐⭐⭐ (4/5) – Essential for students, optional for professionals. It has survived for decades because it teaches