there are some options inside the cli-options file, but what is the recommended way of interfaces? I was thinking all Interfaces shall start with 'I'.

Why is this setting disabled by default? Will Enabled not be better just as the guidelines?

"defaults": {
"prefix": "app",
"sourceDir": "src",
"styleExt": "scss",
"prefixInterfaces": false,
"lazyRoutePrefix": "+"