Can't agree. While there are some evergreen postings, LinkedIn job applications still landed me a couple of interviews (and much more compared to cold applying on the company website). And then there's recruiters reaching out which landed me even more interviews + my current - genuinely great - job.
The recruiters reaching out to me are all for terrible companies or for non-remote roles in other areas of the country. It seems Glassdoor and others have better job boards than LinkedIn.