Would allow custom behavior to scroll to updated nodes, highlight them in browser, etc etc.

Also related to a syncScroll feature requested by @LeaVerou:

You could have a syncScroll setting with options:

• off (default)
• auto: scroll to first changed node
• object literal. filter key: a function to filter out non-relevant nodes. Then you just scroll to the first one.

via https://front-end.social/@leaverou/112887390381826031