You realize any Joes on the street will give you differing answers when you post a rather vague question. It all boils down to circumstances. People in this forum come from different walks of life and full of diversity. The answers are based on personal experience or encounters of their relatives or friends. Therefore, you should contemplate on the background of the posters before taking in their inputs

A general feedback will be MBA is NOT a necessity but rather an advantage. It is impossible to neither quantify nor justify the advantage it may derive. Essentially, NONE can provide you an assurance on what magic MBA can do. My experience and historical research have shown that MBA will be a GREAT added value (Caveat: Top Ivy Leagues ONLY). Again, speaking from my own research, MBA graduates from top ivy leagues have a fairly good ROI. Reason being, the BRANDING mentality is there and they persist. In totality, (put aside scholarships) some people are willing to take huge loans to enroll in Ivy leagues for the RECOGNITION. For knowledge? Yes on a limited capacity. In addition, the greatest achievement in a MBA program is the network you may establish. Indeed, the platform for networking will increase immensely if you enrolled at the right place and at the right time.

Without a shadow of doubt MBA helps, but it is not mandatory. On a case by case basis, we could derive different conclusions.