If the E36 should never have been classified in ITS, then what cars should have been? Are only cars that can't win allowed?

At some point, for a series to survive you need to have some recent vehicles (BMW or not) that are competitive. Otherwise, no one will want to join.

If the E36 was never added to ITS, this discussion would be identical, but directed instead at RX-7s (specifically, but not exclusively, Speedsource RX-7s).

Dan