I think Aircars mainly suffers from being a game that doesn't age well over time. I remember when I first got Aircars, not only was I excited about a new Jaguar game (
any game at that point, I admit), but in comparison to Cybermorph it wasn't bad. Then we played a few rounds of 2-3 players, and really had a lot of fun alternating between working together and suddenly nuking each other.
As I wrote in a review of Aircars long ago, it
would have been a decent game in the 1994-1995 market -- graphically it wasn't cutting edge, but if you look at all the 3D0 and Sega CD stuff that was coming out, it was comparable. From a technical perspective, with a few game play tweaks (no more infinite lives and a better damage system to let the player survive longer) and the incredible 8-player networking, it would have easily been a favorite Jaguar game.
Instead, these days I'd much rather play a round of T2K or Skyhammer on the Jag, and for a great multiplayer game, BattleSphere is obviously superior in every aspect.