Because of the challenges of moving to the cloud, some organizations do not use the public cloud. They use local/on premise systems because..
media, especially high-resolution original camera content, may just take too long to upload to the cloud. Video editing and other uses need high-speed connectivity to the original media, so they work on local workstations.
it may be difficult for an organization to budget what actual cloud costs may be, especially egress charges cloud providers charge.
some local systems may not work in or with the cloud.
although public cloud systems include world-class security protections, some organization may have specialized requirements that preclude or restrict their cloud use.
some places have poor or inconsistent internet connections.