I can only recommend it if you are independently wealthy, want to become an ascetic, or more broadly, your goal is to never be hired or really even evaluated for much in the business world again.
None of the rest of the social networks serve as a sanity check on your resume/application/meeting.
I've round linkedin extremely useful recently for finding a new job after being made redundant. It's where the recruiters are, and where the jobs are posted, at least here in the UK. I even paid for a couple of months enhanced membership, or whatever they call it, as a career investment. I'd say its worth the money over the short-term.
As for maintaining an up-to-date profile, I think its worth dialing-down the access unless you're actively looking for a new job.
But the bs that people post to try to get "engagement" makes my head hurt. I'm about to start a new job in a few weeks and it'll be a relief not to have to bother with linkedin again for a few (hopefully many) years.
It is scary that one platform has so much control over people's lives. If LinkedIn were to ban me for whatever reason tomorrow, finding a job would become virtually impossible.
I could still get a job but it would require more effort. I keep my network updated on what I'm doing and new opportunities, not just jobs, present themselves to me. People who avoid LinkedIn remind of those who scoff at the stock market. Yes, it sucks if you hold it wrong.
I can only recommend it if you are independently wealthy, want to become an ascetic, or more broadly, your goal is to never be hired or really even evaluated for much in the business world again.
None of the rest of the social networks serve as a sanity check on your resume/application/meeting.