I think the point a lot of people are missing is that what was a problem when Poser 4 was a "thing" is not a problem today. Anyone serious about texturing should have access to tools that can do the job.  Correct me if I'm wrong here, as I stopped paying attention to the program years ago, but I'm pretty sure even Blender offers painting directly on a model. So really, other than just pure hatred of new things or an honest dislike of an interface, there's no excuse for not being able to remove visible seams from your textures in the present. The past is dead, let it be so.   So while I can understand how back in the day, you saw a seam and you screamed bloody murder, in today's world, that just shouldn't even be a problem anymore. 

Now here's a big question for you large map types - I have a large, 8K map of a head and body (all on one single map). The head's even scaled up a bit without overlapping on the body, so as to give it a little more texture space.  Then I have an 8K map of a head and body (on separate maps), both scaled up to take the maximum space available on their respective maps. Which set is going to give me better detail?