For ASW what matters directly is the effectiveness of the A/C's MAD system and of its sonobuoys, along with quality of training, amount of ping time per crew etc. And - regardless of the airframe - the MK-I Eyeball has been very effective in locating submarines also. (But I suspect that the time and concentration on the ASW mission is pretty thin compared to what it was in the Cold War.)

More indirectly, the number of A/C we buy, their readiness numbers, their loiter time and range, and the quality of cueing information they operate with will determine their overall effectiveness in ASW.

The quoted article was remiss in not mentioning the S-2F Tracker in its list of ASW fixed-wing A/C.