For several years I have been using the dlvr.it platform to automatically post all my blog posts to both Linkedin and Twitter. This was both to keep up some traffic on Linkedin and Twitter, and to save manually posting anything I wrote. Even though several of my posts over the years were not really suitable for a professional network like Linkedin (eg posts about family, and bells!), I felt that I had enough writings about education, video, data analysis, books, etc, to justify the automatic reposting.
As a retired person I feel I no longer need to keep up with everything on Linkedin. I am fed up of getting messages about recruitment, even though my status is "Retired". I am becoming less and less interested in posts from others, though I still love to see postings by former students announcing promotions and new jobs. I am not leaving Linkedin and Twitter altogether - I'm just not auto-posting any more starting March 1st. I can manually repost anything if I think it is suitable. I don't use Twitter that much, but I have found it handy for technical support and am keeping it for that purpose only.
Does a retired person need Linkedin? Comments welcome!