Hi,
somewhere was a thread asking me to try V9 as it was same as 8.22
cant find it.
so using this thread, its appropriate..
Here I am reporting back on tests so far in V9.
NO BETTER. 
despite seeing mention of fixed ,
the blue dots are at visible dashes,…say no more !!!
all images that are screen grabs in rhino, to be viewed in pshop as top menu>View 100% or enter that in the % box bott left of the image.
V5 is a thin pure line, and see why that is, no steppy nature, AA far better.
I am running a Nvidia GeForce 3070 current card, so no saying its the fault of new cards, as V5 is being run on it as well.
In V7 Gijs said alter gamma solved it, it did but the grids were awful, a tail chase developed to solve the knock on effect, and result was awful
lines steppy, rough, projects to mesh have ants on fishing line look, despite it being said its been solved. V5 can do it.
If I have line thickness set for drawn lines different in V9, let me know, I did ask before doing this, but both layer palettes are set to default. and anyway why make default worse ?
Steve