Compared to Cisco, HPE was easier to get support contracts and customer service was far more helpful. Aruba is part of HP but the Aruba line cannot stack up to the Flexfabric in a high-performance data center environment.
The NEXUS 9000 series is well suited to data center issues. It is ideal for extended L2 without spanning tree issues, as the VTEP is as close as possible to the equipment. Cisco provides various types of controllers for configuring these switches as fabric switches in simple and complex environments.
This equipment is really designed for data centers. For a campus, it is better to turn to the Catalyst product lines.
The switch is intuitive and very simple to configure so I would recommend it to anyone for their data center. It allows for someone who might just be a server expert and not a switching expert to have a far simpler time than would normally be expected.
It's a good product, perhaps a little expensive but with a long service life. Overall, the NEXUS 9000 series does not have many technical limitations. The update process has always gone smoothly so far, but it is important to follow the upgrade path provided by Cisco, as there is one.
Nexus 9000 works together with Netskope to provide connectivity between data centers, the cloud, and remote branches. Both provide scalability, redundant architecture, and security to the network. In some sense both provide end to end security and the ability to store and troubleshoot packet captures to improve operations and security postures.