Originally posted by vat_man
There were a lot of factors, a brief (and not by any means comprehensive) list of which would be:
- costs
- difficulty of controlling power output and therefore safety
- loss of manufacturer interest in the formula. There was a lot of pressure from engine manufacturers to move away from turbocharged engines (particularly one prominent Italian manufacturer)
- domination by Honda (have you seen the stats for 86-87-88?)
There were a few other side issues but those four pretty much cover most of it.