Remember the topic started with:
MikroTik is planning to develop and build a controller app for MikroTik Devices. Currently we are researching possibilities and options
That has about the same intention as:
We are considering to add commonly used functions as built-in.
What functions would you like to see?
as was posted in 2018 ( http://forum.mikrotik.com/t/built-in-function-library/117288/115 )
Nothing ever came of that. So do not consider it a decision that already has been made until some beta version appears.