Any honest appraisal of the investment decisions would recognize that everyone is equally crushed by the virus.
So Boeing's decision to defer real investment because they could not justify the economics of a 737 replacement was correct. At most they were too cheap on the MAX derivative, a $10B oversight.
That notwithstanding, there will be a need for a super efficient yet cheap modest size workhorse after this crisis is resolved.
Perhaps it will come from China, although the engines, the pacing items, are still Chinas weak point.