I was on the waitlist for three months for A, on DFW-ANC but it did clear eventually.
When CX cancelled JFk-HKG last week, they could not get me in to A from JFK-LAX and offered to book me in to Coach. Instead I took EWR-LAX which is a much inferior product but did not want to face 6 hours in Coach.
A availability seems to be a bit of a problem.