I'm still thinking Musk is on a slippery slope, too many projects, too many claims, too much debt. I don't think social networks are the main factor here.
I agree social media is more of a symptom here. I've been worrying about that recently too. From what I see on-line, I feel like his behaviour has become pretty... erratic. He used to be more focused on solving big problems in the past. I worry he'll go completely off the rails at some point, and destroy all the efforts around space access and Mars.