Used to do it, but in Fusion, not in Nuke, which is quite similar. Sure, goal you can reach from the both side - PS and compositors, but working in Fusion&Nuke for someone (like me) could be much more logical interesting and amusing. Nodal approach looks like great constructive buildings, and full 3D environment with camera angles and planes gives such exciting possibilities. Also, today there are and powerful plugins (p.e. Genarts, Foundry) that could help in wider working fields. Allas, in Fusion I didn't find in-software script for metric units (I don't know about Nuke), so at the beginning of process have to convert dimensions to pixels, but later everything is starting to seem as some sort of artistic iniciation and exciting, which I didn't find at same measure in PS. At one word - I miss nodal-based still image compositor, and Fusion (or Nuke) can masterfully fill that gap.