* BTW, that's respectively one-third and one-half the original 25MHz spacing
Older gits will remember, for example, pre-ASR889 50kHz spacing, and designers warning us that yes, you can get a 25kHz modification at great cost, but when you want 8.33/12.5 you better make sure there's money for new radios.
And then OR telling us in '96 that under no circumstances would any military aircraft get 8.33. The result is that, when the penny drops, the cost is borne by chopping some other project that has had the foresight to get it right. Ironic, on the day our glorious leader told Chilcott MoD had enough money and he never refused a request.