This makes it really easy to create hard surface details... and quite ironically, Substance Painter presently does not support multiple axis symmetry (mirroring in more than one axis at a time) which Blender DOES! That said, Substance Painter is an incredible tool for painting PBR textures. Apparently, there are more symmetry features in the works, so hopefully we will get this feature soon in SP, along with radial symmetry. But good 'ol Blender beat them to it... :-)
By the way, you can get neat hard surface alphas for free to use as stencils or tiling textures while painting here:
https://jrotools.com/projects/eerww?album_id=552371 (this guy has some amazing stuff! Consider supporting him by buying a full pack for a small price).
https://www.badking.com.au/site/product-category/alpha-maps/
