I think Webpack is actually slowly moving into that direction. For example, with version 4 there are opinionated defaults and for some cases all you need to do

I think Webpack is actually slowly moving into that direction. For example, with version 4 there are opinionated defaults and for some cases all you need to do is `webpack`, you don't even have to have webpack configuration file if you stick to the defaults. Now the other problem, however there are no defaults in web - one uses react with less, other angular with sass, etc..