The early Kindles didn't do this. It used to annoy me to no end that I'd have to manually tell my Kindle to sync when I was done reading. Originally, I didn't

The early Kindles didn't do this. It used to annoy me to no end that I'd have to manually tell my Kindle to sync when I was done reading. Originally, I didn't realize this. I learned this when I'd pull out my phone in a waiting room, or on a train, only to not be anywhere near where I last read the book on my physical Kindle. Now, I'm quite happy that Kindle syncs aggressively. I use an old phone to read in my hot tub, and it's great that the book opens up to the last place I read it, no matter which phone I'm using.