SharePoint Page Difference Visualization

This is a really cool feature. One of our customer was asking for this.

I'm wondering if there are any plans to provide the means to extend this for custom SPFx webparts and define how a history of a webpart should look like. 

I fiddled a bit with this and noticed how the OOTB Text webpart highlights what was changed inside the webpart rather than just highlighting changes to the webpart which is pretty cool, kind of a diff checker. I checked this with a custom Text based webpart but it does not automatically know to track changes inside, which is understandable.

Would there be such a mechanism in the future to provide a custom implementation for the version history of the contents inside a custom SPFx webpart?