Yeah, if 600W won't keep a Dometic running... Then you know why they sold for $0.50 per Watt.
On the subject of the thread, CIGS are fascinating and a superior product in many respects as the OP pointed out. But the cost is approaching insane unless you very strongly NEED one or more of the key features.
I have a hardshell RTT with nothing but curved surfaces on the top, and I generally seek out shade when setting it up. Drilling the shell is not conceivable. And my loads can be kept modest (see: dometic power consumption) and excessive batteries purchased, but I need a way to top up during long trips and potentially to support higher loads if desired.
So I'm a really good candidate for CIGS. And yet... the only reason I would do that is that it's cool. Because a DC-DC charger will serve the same purpose unless I'm spending 10 days parked in a single location. And even then, those panels will buy quite a few hours of idling.
Anyway. Cool is cool. And I may decide to do the CIGS. But if my application can't justify the cost, it's not hard to see why CIGS are so niche.