I would love to be able to create a new project that contains an application.yml instead of an application.properties file.

Maybe as an option? properties=yaml

Or maybe whiteSpaceBugs=true
Joking aside, we commonly give instructions to rename app.props to app.yml after creating a new project and then provide example configuration in YAML format.

I can understand the desire to keep the number of permutations down, so feel free to close this issue!

Thanks again!