Anyone spouting rubbish like "you will not be welcome" need to remember that if faced with the same situation, the failure of the airline you've worked decades for, and another less favourable one opens up shop, you would most likely DO THE SAME THING especially if you have bills and a family to provide for. And that is the truth.
I've seen my previous joyful colleagues reduced to tears. Right now SAIL are their saviour, and they are under no illusion that the Terms are vastly inferior. But bills need to be paid.