This has not changed in ONTAP.
However for one use case of this there is a work-around. The case is where you have a flexvol or qtree that will be a "workgroup share" for a particular group and you want to limit how much they write.
In the case of a volume, just set the size and put a CIFS share-level ACL that only allows that group to access it. In the case of a qtree, put a tree quota on the qtree and so the same with the share-level ACL.