"Overall, we’ve simplified our use of HTTP. For example, most endpoints always use HTTP POST, including those that return structured data."
Why? Why would you use a POST call for the first endpoint they demonstrate, users/get_current_account
curl -X POST https://api.dropbox.com/2-beta/users/get_current_account \
--header "Authorization: Bearer <access-token>" \
--header "Content-Type: application/json" \
--data "null"
Why not implement that as a GET-call?