Minification... how many times have I seen devs claiming that adding a whole toolchain for saving a few kilobytes is crucial to performance and simultaneously failing to serve assets with proper compression and cache headers ? Heck, how many times have I seen "web" devs with no basic understanding of the HTTP protocol ?

And they look at me like I'm the lunatic when I tell them their 3 text fields 2 buttons "app" is over-engineered and needs no build step.