substance painter update quite often and with new features. here is list of important updates
Substance Painter 2020.2 (2020.07)
UDIM support
Substance Painter 2020.1 (2020.04)
decal workflow
python api (replacing its javascript api)
Substance Painter Concepts
substance shader »links» multi Texture Set (list of texture image files; or list of texture layers, each layer has sets of effects, its mask also has sets of effects) === multiple shaders »links» multiple geo