Why I don't like Kindle eBooks they are treated different than paper printed books, stitched up with DRM they are electronic but not allowed to cross borders or geographic areas. Try buying Kindle eBook and sending to another country as gift, first lets waste your time choosing eBook fill in your details plus recipients press send, rejected you may only send to person living in same country as you.
Plus the cost of eBooks for kindle being same price or more than paperbacks not talking about the info booklets and other fluff giving away.
Kindle has been around for a while and I don't see it improving for the customer.
Better alternatives
https://calibre-ebook.com/