In many cases, they are utilized to show 3D views in precise manner in manufacturing drawing, interior space views, or exploded iso views. Isometric looks prettier than Axonometric projection in general.
Manufacturing drawing
Interior view
Exploded Iso
source:
https://visual.ly/blog/visualization-in-architecture-drawing-types/
https://designstudioiii.wordpress.com/2011/09/19/axonometric-isometric-paraline-drawings/
https://youngwildandfreed.weebly.com/oblique-and-isometric-sketches.html
exploded iso
https://tsa16nolli.tumblr.com/image/146361181761