For the first kind, 485 approval could take year but they can change employment at will; for the second kind, basically they have to stay with current job or restart the GC process through new employer or forget about GC.
I wish my 485 is pending but it's not filed yet. I am one of you who was between a rock and a hard place. I hope for the best and prepare for the reality.
For the same purpose, I wish you can share your thoughts or experiences on this. No hard feeling.