Yerah,
And don't forget in that particular TAS episode "The Counter-Clock Incident", the Aliens have ships capable of Warp 36 (no, not a typo), so yeah if someone REALLY wants to harp on the episode's 'canonicity'; that would make the ENTIRE BERMAN TREK ERA NON-CANONICAL, as TNG and subsequent Trek series stated WARP 10 was the fastest warp speed possible.![]()
Wasn't that later retconned in some of the tie in media as the result of a recalibration of the warp scales, too? The Farenheit vs Celsius vs Kelvin of Warp Scales, as it were.