I'm looking at it right now: > mobx-keystone is a state container that combines the simplicity and ease of mutable data with the traceability of immutable data

I'm looking at it right now: > mobx-keystone is a state container that combines the simplicity and ease of mutable data with the traceability of immutable data and the reactiveness and performance of observable data, all with a fully compatible TypeScript syntax. I'm too old to understand all this.