Smooth gradients are unnecessary in PCB artwork, but laser photoplotting still benefits from anti-aliasing of edges
https://www.newsbreak.com/dmr-news-321522575/4524631068041-artnet-pro-sets-the-standard-in-high-resolution-pcb-photoplotting-for-aerospace-and-advanced-electronics
Smooth gradients are unnecessary in PCB artwork, but laser photoplotting still benefits from anti-aliasing of edges, producing cleaner arcs and diagonal traces that etch predictably and pass AOI.