[brianwawok]

Well, at least in Google Cloud for planned updates you can get your VM host migrated and not lose a Node due to a planned maintenance. I am not aware if Azure supports this, but my guess is they do not.

[rarudduck]

They (Azure) do for most operations.

https://docs.microsoft.com/en-us/azure/virtual-machines/wind...

I've found actual reboots to be rare - the exception being the recent Spectre / Meltdown patching.