It's worth noting that the actual volumes of non-recyclable material left when we're done with solar panels are tiny compared with the huge ponds of toxic ash left by coal.
Sure, I don't think anyone discussing energy production in good faith would claim that coal is anything other than the absolute worst. It's not exactly a huge achievement to say something is less bad than the most polluting method of energy generation in existence.
Right, but that doesnt mean they're perfect and their flaws shouldnt be discussed, if for no other reason than to ensure it doesnt become a bigger problem in the future.
In addition to the waste problem the article also talks about the world supply of silver being exhausted in ~20 years if solar continues to expand at the expected 5-10x. That sounds like a problem, its probably fixable by shifting to new designs but it needs to be considered and work put into that in order to do so.