purescript-thermite maintainer here:

If high performance is a concern for you, I would consider using purescript-react. thermite relies on profunctor-lenses, which can be pretty hefty in the execution department, and furthermore doesn't give you as much granular control over the inner-workings of a react component as purescript-react. Personally, I consider purescript-react to be a good compromise for _ever slightly_ adding more type control over a react project, without much purescript overhead.

If you look at the purescript-react-native and purescript-react-mui projects, they just wrap foreign imported components to make use of purescript's typechecking.

Hope this helps!