Kinda reminds me to the legendary Canon 50mm f/0.95.
Manual focusing at f/0.95 is not that easy and with that reaaallly shallow depth-of-field, making interesting composition is hard.
The 'NIKKOR Z 58mm f/0.95 S Noct' is Nikon's answer to that, and yeah, it is difficult to nail focus when you have a depth of field for close subjects that's in fractions of millimeters!