My desktop machine can fully rebuild the game in a few minutes. Azure takes 20-30 minutes. I'm sure many of these cloud services are using way over worked VMs. I'll deal with it because I don't want to set up and maintain my own machines for building. I have a game to make and CI build machines isn't where I want to spend any effort.
@grumpygamer this is an interesting idea and (as presented anyway) economical. Building on scalable "serverless" nodes where you only pay for the non-idle miliseconds. https://blog.nelhage.com/post/building-llvm-in-90s/