"And you're suggesting Boeing is in trouble?"
I think Boeing's issues with the write-offs on 747 & KC-46 and continuing losses on the 787 ($19 million loss per unit in 2016, still adding to $32 billion of program costs accumulated to date) are not insignificant, even for a corporation of its size and strength.
The fact is the 737 'Y' seat is only 17" wide, against the A320 at 18" wide and the C Series at 19" (with a wider aisle than both competitors), Boeing will likely have to face up to a clean-sheet replacement for their single aisle products in the not-so-distant future.