Fast Software, the Best Software
Performance matters! It is important to find the source of the slowness - for example I discovered some CSS animations are useless and very slow. Vuetify material button felt very slow on touch until I removed that useless material ink spreading effect, which IIRC even had to modify DOM after touching it to work. I still believe JS apps can work fast, if only developers cared more about speed than all those useless animations and transitions...