The difference between Microsoft and the linux kernel community as demonstrated in this case is what I termed 'balance'.

> Microsoft had gone as far as emulating undocumented/undefined API behavior for misbehaving/buggy applications

Yeah, I believe Chen writes about code for SimCity. This is where Microsoft loses balance. They keep backwards compatibility to a fault. Literally a fault. At some point the kernel will no longer have `struct buffer_head`, at least not in the mainline, though it may be a while. That backwards compatibility will go away. Microsoft has been and continues to be bad about end-of-life for their software. They keep things around that should be gone, and remove or stop supporting things that should stay.