i dunno. i've only had problems calculating dynamics when i did something (very) wrong.  and i've only got a dual core and 3 gigs of RAM.  i haven't had snug items be a problem, but i guess i could see the complaint.  imho, it's more important that i don't have to go through a whole lot of rigamarole just to use my morphs.

personally, the only problem i've encountered so far with dynamic clothes is that all but a select few  people have done little more than slap a mesh together and call it done.  even the most basic conforming clothes seem to be made from tons of input from a multitude of knowledgeable people, and years of innovation.  but since that time of experimentation and new ideas, people mostly just do the same thing that was already done, and you don't see many innovators when it comes to dynamic clothes.  so there's a few select products i could buy, a few outfits, and that's it for anything decent. 

i just use conforming clothes,  but i have to work at using dynamic ones.  not because dynamics is harder, but because most dynamic clothes are the equivalent of trying to use conforming clothes without JCM, body handles, super-conforming, or any morphs at all.