I worked at least a dozen web development courses on Udemy that I could not successfully complete due to the course content being 'deprecated' or the project from the course content had technical conflicts, bugs etc that were outside the scope of the 'course requirements'.
Udemy promotional information and content within the Udemy online course system gave me the impression that I would be able to successfully build website projects and get support from the instructors that create the courses.
However I have not had one instructor answer any of my questions neither have I seen any instructor in the many courses I have done answer any questions from other students in their Q and A sections of their courses.
From my experience now with more than a dozen web development courses on Udemy the course content, programming code is not being maintained (by instructors that create the courses they are paid for) to keep up with changes in web application dependencies etc resulting in projects that won't function at all or have serious issues that result in failure to successfully complete the course.
In a chat with a Udemy support person I was basically told that Udemy has no intention of requiring Udemy instructors to support the courses they profit from on Udemy. That Udemy has no intention of requiring instructors to answer ANY questions in their Q and A sections where students ask questions trying to learn how to successfully build projects from the Udemy courses. That Udemy have no intention of requiring instructors to maintain their course content so the web development course projects function properly with current code dependencies and refactored course project programming code as needed so the course may be successfully completed by students within the 'course requirements' that are the skill levels of students working Udemy courses.
So basically Udemy are selling web development courses that they know are not able to be successfully completed by Udemy students/customers due to programming code deprecations etc after the course is published that are not being corrected by course instructors who are profiting from the sales of these practically useless web development courses.
Udemy boasts '8000 web development courses available with the montly subscription'. Their support personnel told me that these courses can become 'deprecated' within a month of publication. Yet they promote '8000' courses as if it is some value consumers will benefit from.