Airline losses will be dealt with over a period of time as a mixture of cash payments, price cuts on future orders and more favourable payment terms.
Committed, long term Boeing customers such as Southwest or Ryanair would likely take that option. Smaller operators with only a few aircraft on order who aren't as tied into Boeing might take a less charitable view and demand monetary compensation with a much shorter time frame, particularly if they have been pushed into the red and are struggling to survive. There could be a class action lawsuit against Boeing as so many different parties are involved.
I suspect that our legal friends are looking forward to testing the meaning of such words as "reasonable" and "force majeur"
I suspect our legal friends are looking forward to their fees, many lawyers will be able to retire and not have to work again out of this.