Airbus A380 failed A similar test at 3% less load and Airbus responded in a similar fashion. Boeing has problems, but this is practically a pass.
Airbus was testing a new (higher MTOW) variant of the A380. It's likely Airbus was expecting the premature failure as the fix was quickly deployed. I'm pretty sure you can't say the same about the 777X.
Note that wing spar cracks were later found in pretty much every early build A380 in service. Airbus then spent around 500,000,000 EUR to remedy the problem.
I'm sure Boeing can make the 777X safe, but it's likely a matter of motivation.
