On the pro-save side of things, how many times have we encountered "out of memory" messages or other things that have crashed Poser and lost all our work in the process? Studio, being brand new, will probably crash because of the myriad systems it has to run under, so being able to save your work to find out why it crashed would be helpful, no? Otherwise, the first beta should just be a rendering machine and nothing else: no posing function, no libraries, nada -- just load in the file you made in P4 and hit render.