May be, React itself go through lots of transitions like, class-components to functional to hooks. Svelte is in early stage, so I am sure there will be changes in svelte as well. And I don't care about performance that much because Browsers and devices always getting better. But Having said that, React's DOM thing always add constraints, like you can only use react supported ui-lib because everything should be in react's tree. Pure HTML and web-components library is very hard to handle with react.