I just read one blog post ("Musk on Mars") and it was indeed excellent. He seems to have quite a small readership though, judging from the Substack reactions.

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decimalenough 10 hours ago | parent [-]

It's subscribers only and costs $5/month.

	▲	cubefox 4 hours ago \| parent [-]
		Yeah, though some posts a free. I think real problem is that he decided to start a Mars blog two weeks before SpaceX announced they are now focusing on the moon instead, and prior to that merging with xAI, effectively cancelling any Mars plans.