>i don't understand this holy crusade against bloat. Yes, many if not most of websites i visit are bloated, but i think reasonable steps are the right answer (like an automatic, idiot-proof system that serves 4k pictures to 4k-displays and hd pictures to smartphones).

What's reasonable about serving MBs of BS to people who don't care for them just to follow the latest design trends, or the latest frameworks, or whatever?