No one is proposing a solar-only future, and this guy's comment isn't arguing against that...
His comment points out valid concerns for a future that appears to be trending in the direction of relying more and more on solar power - these are real concerns even if solar accounts for ~20% of all power generation, not some 100% solar-only future. It's a reminder that solar power is not some silver bullet solution to energy generation.
I've been hearing these "concerns" for 25 years, yet as the link shows this has not stopped a an ongoing explosion in solar investment - presumably a large chunk of that from people who are not complete fucking idiots and are aware of OPs 1990's-era concerns.
His comment points out valid concerns for a future that appears to be trending in the direction of relying more and more on solar power - these are real concerns even if solar accounts for ~20% of all power generation, not some 100% solar-only future. It's a reminder that solar power is not some silver bullet solution to energy generation.