From any who focus stack macro images, are there any revisions to the above topic, eg, “better” applications? Ideally, I am looking for an application that can handle raw files and produce, ideally, a raw file.
It’s impossible. A RAW file is what the sensor has recorded. A stack is the result of a post processing.
But you could process your RAWs in PL with just optical corrections and denoising, then export as a linear DNG wich gives you the same post processing possibilities as a RAW.
After that, you can use any stacking SW.
I did not read the article. However, ON1 Photo Raw will do this for you. You can open your camera’s raw files in ON1. You can then perform a focus stack or HDR or Pano. The file created is a .onphoto file (sort of like .psd).
Export this file to DNG and it opens perfectly fine in PL8 (as long as the base raw file is compatible with DXO)