After some talks with @domin-mnd, we decided this would be somewhat difficult to include in core, and instead are considering making a separate library for DJS-specific helpers (think Reacord's lodash) that would include hooks like this.

We'd also need to figure out what a good API for this would look like specifically, e.g. would it only return a DJS live cache of reactions? What options should it accept? etc.

Yea customs hooks would be good, but you would need to be able to get the message id and rerender the component manually