Review the management interface architecture changes before upgrading: https://documentation.meraki.com/MS/Cloud-Native_IOS_XE/Cloud-Native_IOS_XE_Overview#Changes_in_Behavior
Review the key upgrade and migration considerations in the Cloud Management with IOS XE documentation: https://documentation.meraki.com/Switching/Cloud_Management_with_IOS_XE/Product_Information/Overviews_and_Datasheets/Cloud_Management_with_IOS_XE_Overview#Before_You_Upgrade_or_Migrate:_Key_Considerations
Cloud Management with IOS XE introduces a significant architectural shift from the previous container-based design to a cloud-native framework for cloud-managed Cisco Catalyst switches, including the C9300-M, C9300L-M, C9300X-M, C9200L, and MS390 families
These include faster boot and initialization performance, especially for stacks, and provides the foundation for a new generation of capabilities built on IOS XE