I definitely share your view that the content there is lack lustre (was it ever great?) and it's certainly a high noise-to-signal platform for job searching.
My experience is that it is still an excellent place to reach prospective buyers and to do a semi-authentic style of marketing. The number of impressions a good post gets far exceeds other platforms (X, Medium etc) and, if you're pretty diligent about your connections, those impressions are generally high-quality in the sense they are in your target market.
I've seen a few post from others more successful that me, on this topic. Including Gagan Byiani (Udemy cofounder)[1]
[1]: https://www.linkedin.com/posts/gaganbiyani_ive-had-over-1m-i...
