Azure App Service - Maintenance control for platform updates
Following on a MS case, it would be ideal to have platform upgrade schedules exposed for Paas App Services similar to what you are planning for Iaas VM's:
We had several incidents occur due to the platform upgrades, and our clients are eager to be able to reactively/proactively monitor for these events. However, this data is not exposed on the platform.
Eric E. commented
The effects of not knowing when platform upgrades has been catastrophic for some of our customers at the time they are performed. Yes, there is an element of code efficiencies, . but knowing when there will be platform adjustments would help mitigate the effects.