- operating systems,
- browsers,
- aspect ratios, or,
- devices
Web technology is a scam, constantly reinventing itself. There are no true experts, everyone is scrabbling for the next framework which promises the world but just expresses the same set of problems in a new and interesting syntax, with increasingly unintuitive paradigms.
It is eternally "almost getting there", near enough but not good enough, needing to own increasingly more things that should rightly belong to an operating system to work acceptably.