Cannot able create a Record from another Record (With all optional keys)

Partially yes. Sorry, I have not been specific with my words – the boilerplate I am referring to is the need of a bMutable type to being able to modify the record. But anyway, I think that this problem only exists because of some terrible design decisions in JS, I am open to ideas but I am not sure Rescript should actually have some additional features to handle this case in a more ergonomic way.