So when running the plugin I am not seeing any significant reduction and in fact I am still seeing references to css that isn't being used via bootstrap. I have followed all directions and I am seeing other experiencing the same issue such as here: https://github.com/webpack-contrib/purifycss-webpack/issues/49
It's hard to say anything concrete based on output alone. I would need as simple as possible project to study that fails to pick up some class to say more.
So when running the plugin I am not seeing any significant reduction and in fact I am still seeing references to css that isn't being used via bootstrap. I have followed all directions and I am seeing other experiencing the same issue such as here: https://github.com/webpack-contrib/purifycss-webpack/issues/49