But the 2010 MBAs aren't using their flash storage through a SATA interface - they're directly mounted on the motherboard, probably exposed as a pure PCIe device. TRIM is irrelevant for them.
UPDATE:
BAH! Wrong. The MBA uses a Toshiba t6ug1xbg controller, which seems to provide a SATA interface. So it is an issue.
UPDATE:
BAH! Wrong. The MBA uses a Toshiba t6ug1xbg controller, which seems to provide a SATA interface. So it is an issue.