BuzzBox
Descending to 10000 feet is an assumption that the crew knew that a depressurisation event was occurring.
If the crew don’t believe and don’t have any cabin altitude warning at IGARI, then there mindset is to divert at a suitable LRC speed ie Mach0.84 at an appropriate altitude (FL340). There is no need to descend.
Given the amount of failures and considering the time taken by other complex emergencies, such as QF32, then MH370 is not going to be ready for landing in 10minutes.
Unfortunately for some, the oxygen bottle rupture theory does match all the evidence and flightpath.
It ends with a deceased crew and the aircraft flying until fuel exhaustion and crashing in the southern Indian Ocean.
The bottle was repressurised immediately prior to flight by Malaysia.