Well put.
I'm in the camp of "I have no idea how things will turn out for Spirit", hence the question of those who've been around longer than I have and may have seen the warning signs at previous airlines. I'm retired Air Force and went through years of "force shaping" uncertainty where I didn't know if I'd have a job next year. I'm wondering if I'm in that sort of position again with Spirit and how much time I have left before the wheels fall off, so to speak.
Like you said, no one knows the answer, so make a decision thats best for you and hope it works out.