I've been reading some perspective books over the years, and in my current one, I just came across axonometric perspective vs conical perspective. Axonometric being the one that "depicts the object as is" (as described by the book) and is used for blue prints and such. It says it shows more what an object actually looks like.

Can axonometric perspective be mixed with conical perspective at all? Like if I have a cube paper weight near me in a scene and I'm looking down at it, do the parallel lines meet at a vanishing point that is so far away that it would count as being in axonometric perspective and conical perspective at the same time?
What are the benefits or downsides of keeping these types of perspectives seperate?
I think I'm just slightly confused by the book saying axonometric perspective shows objects "as is". I thought that was the idea with most applications of (conical) perspective.

TLDR; Anyone have any insights into axonometric vs conical perspective, if they're mix-able (ie both doable in one composition/piece), and what are the advantages of one vs the other?