For me, speedway's real decline began when they introduced such things at double point Tactical rides and 39 point points limits. I'm not sure when that was now. Maybe around 2000-ish?
These, for me, caused a big reaction, and I remember going the following season and being surprised at how much crowds had gone down as a result. I don't think the sport ever really recovered from these "adjustments".
The big irony with these, if course, is that it was Ipswich (the team that everyone now sees as the powerhouse strong side) that were very influential in such things being brought in because they were struggling with weak sides.
Nowadays I struggle to get through a meeting on the TV. I'm sure that losing my team (Swindon) has a part to play in this, but I really do look at the sport on a Monday night and wonder why it is so boring. Is it just my own interest dropping off, or has it genuinely become that?
I grew up loving speedway, and going to Swindon, Oxford and Reading where huge crowds would bait each other and the atmosphere would thrive on it. I guess I blinked and the World changed.