See the Minimal E-ink phone
An e ink phone already exists, in reality. I don’t know why you would hold out hope for a Kickstarter.
But everything I've seen indicates that Minimal is going to be heavily delayed, if it's not an outright scam. Meanwhile, the Light Phone 2 has been around for years now, and they're planning to release updated hardware later this year.
I'd love to have a second phone that I could take around when I'm not expecting to do any photography or anything. (I know, I could have a dedicated camera instead, but I take pictures on my phone...)
Swapping sim cards is probably too much of a hassle. You could just make the epaper phone your primary, and drag along the second phone as needed. Also, there is no reason an epaper phone can't take photos. Plenty of camera gear out there where the viewfinder/preview screen is a very poor preview of the final image and regardless, most folks just snap away with their phones and look at the images later. Modern smartphones do most of the work regarding camera settings.
I would love that, but really doubt any company is going to put out a phone with a great camera and an epaper screen.