All three in our family love ebooks on our Kindles, mainly for reading fiction. We also love our "real books" especially when the smaller format of the Kindle doesn't work or when the book has a lot of pictures. We gave our daughter her Kindle first when she was 7 and her reading habit has really taken off. She's now nearly 10 and still considers her Kindle one of the best gifts she ever had.
The convenience of taking a whole library with you wherever you go and the front lit option for reading in your bed make a huge difference for all of us. Some how book lights never worked very well for me.
ebook pricing is definitely a disaster, in India I often find physical books cheaper than ebooks, so I end up buying whatever version is cheaper. So I can understand why ebook sales can drop but that doesn't necessarily mean ebook reading is dropping. We subscribe to Kindle Unlimited and plenty of free (and legal) or cheap ebooks are available if you know where to look (Bookbub for example).
As to digital detox, what do you the idiot box is? If the Kindle keeps my daughter away from the TV (and it did), I'm all for it!