Yeah.. we've had this discussion previously. The gist is that if you want Di2, the manufacturers change a bunch of other stuff of questionable actual value and then add a huge markup; the consumer left wondering what actually changes the price by what it has. It's all marketing.
eg.
https://www.cannondale.com/en/USA/Bi...5-0ae578fa94d3

vs
https://www.cannondale.com/en/USA/Bi...f-8958dca22444