Any complex system - and these cloud systems must be immensely complex - accumulate cruft and bloat and bugs until the entire thing starts to look like an old hotel that hasn’t been renovated in 30 years.

It’s not inevitable. Absolutely this is true without significant effort, but if you’ve been around the traps for long enough (in enough organisations), you get to see that the level of quality can vary widely. Avoiding the mud-pit does require a whole org commitment, starting from senior leadership.

This story is more interesting, in my opinion, in how quickly things devolved and also how unwilling the more senior layers of the org were to address it. At a whole company level, the rot really sets in when you start to lose the key people that built and know the system. That seems to be what’s happening here, and it does not bode well for MS in the medium term.