It’s just the time savings, any competent engineer can implement better transitions, it’s just not very high priority these days. A simple one liner built-in is very convenient.
Then why do you need bloated web UI that's not performant as React, Vue, Angular, Svelte? You can also just add 1 line of css classes to HTML elements to have transitions if you use a library like Animate.css.
Then why do you need bloated web UI that's not performant as React, Vue, Angular, Svelte? You can also just add 1 line of css classes to HTML elements to have transitions if you use a library like Animate.css.