What about push notifications and Parse Config? Social apps that triggered push notifications now loose that functionality when moving to Parse Server, right?
Also what about security? One of the beautiful things about Parse was not having to worry about servers and the security of back-end because you knew Parse was on top of it.
Depends on your viewpoint: One of the beautiful things about having your own back-end is not having to worry whether or not some 3rd party team is not neglecting security of the back-end because you know you are on top of it.