Midjourney certainly has come a long way in 2.5 years! The first image is a render I did this week - my first one attempting two characters in the same image. The second image is the very first Midjourney render of Alex (back in Aug 2022).
The main feature that isn't there yet is the ability to really fine-tune images once they've been created. MJ and several of the other image generators do have editing capabilities now, but they tend to alter the overall image as they edit, and the quality degrades.
I need to be able to tell it, "now lighten her skin tone a bit, as she should be kind of pale." Then "fix the gadget on his wrist and remove the object that's in front of her forearm." Then maybe "lessen the muscles in his arms just a lttle; he's not a gym rat. ;)"
But, you know, damn.