Mason,

Please allow me to direct your attention to KatolaZ' talk at the Devuan
conference starting from the 46 minute mark:
https://invidio.us/watch?v=JjxVjy1eIyM

In this section of his talk, KatolaZ explains what Aprolla does (and
what it does not do) in excellent detail.

I hope this provides clarity.

--
Plasma