The new blades are great, the old blades have been sharpened every 4 for over what ended up being 4 years - I thought it was 3, but then found the receipt for the old ones in the box. There just wasn't anything left on them. She has all her jumps and spins back now.
<<Emphasis added>>
Just to clarify:
(a) Were they sharpened every 4 weeks or every 4 months?
(b) When you say the old blades were flat, do you mean just the spin rocker was flat, or do you mean both the spin rocker and the main rocker were flat (relative to new blades)?
(c) How much metal (height) was there left between the chrome relief region boundary and the sharpened edges on the old blades, and what is the corresponding height on the new blades? (If you have the standard chrome-plated carbon steel blades, the chrome plating is removed in a region near the edges, and the boundary is clearly visible.) You should take measurements at several spots along the blade (at least at sweet spot, center of blade, and heel of blade).
ETA:
(1)
If the sharpening is done properly, the main rocker
should not get flattened throughout the service life of the blade.
(2)
If the sharpening is done properly, the spin rocker
should get flattened throughout the service life of the blade. That's because, with a standard sharpener, there is a zone immediately behind the toepick that the wheel can't access (otherwise the wheel would damage the toepick). Some expert techs with the proper equipment (a cross grinder) can touch up the spin rocker and grind down the toepick to maintain the spin rocker better, but this is not a routine operation. Though, even with touchups, eventually the spin rocker does get flattened.
(3) In regular sharpening, if the skater does not want a drastic change in skating feel after sharpening, the skater does not wait until the edges are really dull before getting them sharpened ... the skater gets them sharpened before they are really dull. Similarly, in deciding when to replace blades, if a skater does not want a drastic change in skating feel after replacement, the skater does not wait until the available hardened steel is nearly depleted ... the skater replaces them before the spin rocker is too flat.
(4) Just because your skater needed some adjustment period with her new Supremes, you shouldn't conclude that you should have saved the money and switched to your free Coronation Aces. [Whenever you get new boots or new blades, even of the same model, some adjustment period is expected.] The Coronation Aces likely would require a more prolonged adjustment period because a new Coronation Ace has a less flat main rocker and a less flat spin rocker than those of a new Supreme (as well as other differences that I pointed out earlier), so the change in skating feel would have been even more drastic.
