Experience Manager Assets
AEM Assets has the limitation of 1000 assets per folder. This is due to the way the nodes are built in the JCR.
Note that the Assets Sizing Guide should be used as a guideline to start with 0. Although usually ordered folder does have the performance overhead and should be 1000 assets as a general high-level best practice. For larger numbers, have a look at unordered folders only.
OAK recommends using *un-orderable* node type to scale large number of child nodes 1. Use
sling:Folder node type instead of