To reiterate the point of my comment above: how big is the difference when using Svelte, really? Is it simpler nicer, or does it let you model the problem more closely?
I don’t have enough experience with it to say (though I do like to see it leveraging compiler tech to optimize rendering flows), but I think that is the question to ask. If it’s basically the same model as React, we really don’t lose much by using React, even if Svelte is nicer. If it’s a new model, it may be worth fighting.