New Immutable Pipe "freezeUntil" for Observables

[gogogoober]

Currently Im able to get some form of immutability in observables but not at runtime. In angular, if I use ngModel directly on an observable Im able to modify its value.

Using the code below I'm able to ensure only the methods in my service can modify the Behavior subject and at compile time my observable is locked down and cant be modified externally. This however doesn't apply to complete that use | async then use an ngModel for a template form.

private readonly _orders = new BehaviorSubject<Order[]>([]);
readonly orders$= this._orders.asObservable();

Our team is looking to implement Redux just for its immutability. it will drag with it a ton of boiler plate and complexity to accomplish ONE goal. Immutability.

private ordersEditable$ = new BehaviorSubject(false);
public orders$ = new BehaviorSubject([]).pipe(freezeUntil(ordersEditable$))

[RobinVdBroeck]

Use something like Object.freeze(), deepfreeze and readonly from typescript?