How much cheaper do Electrochromic Windows need to be?

Hi folks, I am looking at electrochromic window technology and trying to understand how cheap electrochromic windows need to be before we will see higher rates of adoption. Is anyone interested in electrochromic windows in residential developments? Are there any developers, builders, designers, buyers, etc that have considered (even just a little!) electrochromic windows for their developments (residential or commercial) before, who would be interested in sharing their thoughts on this? Also happy to have a longer conversation with anyone about this offline.

Thank you!