Despite the strengths, relying solely on Udemy for backend engineering has limitations. Video courses age quickly; Go releases new versions (e.g., generics in 1.18, slog in 1.21) and best practices evolve. A course from 2020 may teach dep instead of go modules , or lack guidance on generics. Furthermore, Udemy’s marketplace model means quality varies wildly. Some courses are shallow rehashes of documentation; others are deep, rigorous, and updated regularly. The learner must read reviews, check the publication date, and sample the curriculum.