Many people tend to emulate the actions of others without much thought or consideration, but you should not be one of them. Choosing IIT Bombay just because others are doing so may not be the best decision for you. However, if you want to join the best institute for your field of study, IIT Bombay is a great choice.
Earlier, students blindly used to follow others to join IIT Kanpur. But now, IIT Bombay is the preferred choice. This is because the best students prefer IIT Bombay over other IITs. As a result, the top companies also prefer to hire students from IIT Bombay, which further improves its statistics, making it even more attractive to the best students.
Apart from that, one of the reasons for choosing IIT Bombay is the presence of the best faculty. The best faculties are attracted more towards IIT Bombay (and then IIT Delhi) because these cities have the best urban infrastructure for their families and children. They also get more consulting and teaching assignments from outside, which enhances their income since the salaries of all IITs are the same. Most professors are reluctant to go to small cities like Kanpur or Kharagpur and prefer Delhi and Mumbai.
Therefore, if you are looking for the best institute for your field of study, and if you value the presence of the best faculty, then IIT Bombay would be an excellent choice for you.