For my wife, who works in sales, the value in business school was rounding out her knowledge. She went part-time, so it was all about the content, not about net

For my wife, who works in sales, the value in business school was rounding out her knowledge. She went part-time, so it was all about the content, not about networking quite so much. It also was an order of magnitude less expensive with no (financial) opportunity cost. Yes, you learn a ton on the job. On-the-job learning also leaves gaps and blind spots; sometimes even an excellent working knowledge has gaps that you don't even know exist until you crack open a textbook. The MBA provides structure, motivation, discussion, teaching resources, access to documents you otherwise wouldn't, but perhaps most importantly, it forces you to deep-dive on topics that maybe you haven't yet encountered or frankly didn't feel interested in. At least for part-time, I wouldn't go in expecting it to change your life; but it is certainly an education, and one that's directly applicable to many aspects of a career. There's no way you'll learn nothing.