I would suggest the Kindle. Most of what you need is automated.
Text input on the Kindle is not the greatest, and I think there are issues when syncing sideloaded books but I don't use my laptop for reading the longform anymore. Nor printed books for that matter. There's no need for me to sync, and in the future I doubt many people will have a need to sync, a flexible foldable ereading device will be fine for all uses.
