Yeah, I like the speed of the renders. It feels relatively smooth. OP's post to me feels like a marketing post where the output image is a really close represe

Yeah, I like the speed of the renders. It feels relatively smooth. OP's post to me feels like a marketing post where the output image is a really close representation of the product they hope to sell. We always called these types of things "carefully selected, random examples", in short they are cherry-picked for their adherence to a standard. In that same vein mine is also a carefully selected, random example of the output you get when the algorithms don't work well, therefore the "Needs work" qualification. Both are useful since you need to understand the limitations of the tools that you are employing. In my case I stepped thru animals until I found one that it could not render accurately. It did know that a coelacanth is a fish but it couldn't produce an accurate image of one. Then I added modifiers that it could not place in context. It's a bit like searching the debris field of a tornado for perfectly rounded debris particles and holding those up as a typical result without mentioning that you end up having to ignore all the splintery debris scattered from hell to breakfast around it.