The problem is there are always a couple janky things. This is janky on Chrome. That is janky on Safari. Something else is janky on Edge. Every framework is

The problem is there are always a couple janky things. This is janky on Chrome. That is janky on Safari. Something else is janky on Edge. Every framework is about making the janky uniform across operating systems and browsers. Programmers don't want to have to learn how to anti-jank on 40 different browsers. They want to learn how to anti-jank on 1 framework and get on with life.