Currently, I am in 4th year of my Ph.D. and my area of research is very big and quite active. Unfortunately, to the best of my knowledge, no one has ever written a survey paper that could summarize the important results of the last 20 years. A few survey papers that I have found till now, span a very narrow variety of results.
I have made a notebook for myself where I have written down all the major results that I have encountered through my Ph.D.. I find it very useful from time to time; for example when I write the introduction of a paper or look for an open problem in the area. I keep updating the notebook whenever any new result appears.
Right now, I have enough knowledge to write a survey paper. And, I would have to study a bit more to make it more complete. But I am finding it wasteful. I think that writing such a paper would only benefit other researchers and not me since I already have my personal notebook with me. Also, I think, I would be wasting my Ph.D. time writing a survey paper when I could be solving my own research problem.
Are there any self benefits for writing a survey paper? If so, maybe I can get the motivation to write one. Thanks!