Nikon 50mm f/1.2 doesn't have AF-S, it's manual focus. Given that I will mainly using it for taking portrait where I presume to have enough time to focus properly on the subject, can there be any other use case when the absence of AF be a big issue? If I shoot in low-light with aperture wide open to leverage the efficacy of a fast lens, I guess the performance of AF is not impressive in general. Hence, I personally think that manual focus is acceptable. But, want to cross check with other users who might have faced some problem that I am failing to sense apriori. Moreover, this post from some f/1.4G user puts me in great dilemma.
I keep WANTING an f1.2....every decade or so, I find myself buying one of the 50/55mm f1.2 Nikkors, use if for a few months, then sell it again. F1.4, heck even the f1.8 do more than fine for focus juxtaposition and low light work; and finding the right focus on the 1.2 handheld is always a gamble.... alas, they are lovely lenses.