Having played more than 400 hours since the release of 0.7.0b3 on my computer with rx470 I have not encountered any problems in the game, except that after 80-90 days, around the base becomes so many mushrooms that fps becomes unplayable.
Also I played in several PC clubs, and from several computers of my friends personally, and although the game sessions are not long, but on gtx 960, gtx 760, rx6500xt, gtx 1060, gtx 1660s, rtx 2060, rtx 3050 I did not notice any problems, except for the bug with screen resolution on monitors with 2-4k resolution, which I think promised to fix in packnout 0.7.1/0.8.
I do not think that the problem with the optimization is so bad, and as I think the errors in it is very few, but there are moments that still need to be improved as textures during bad sun event, boulder textures in the cave and some other places that do not have collision, which I think the pointing of the finger is not necessary, because these are obvious problems that I think the author will deal with in the future.