From my own personal experience that's well wide of the mark. I've been to 14 tracks this season. Of those Sheffield and Belle Vue were the only venues that stopped you taking food and drink into the stadium. I also attend a lot of premiership football matches, none have stopped me taking my own items in with me. Speedway needs every punter it can get. Alienating those few that still go will cost the stadium owners long term.
The match was there for the taking for Sheffield. Far too many thrown away points enabled the Eagles to get out of jail. An entertaining meeting for me as a neutral.
Shame the rest of its gone. I worked over there a few times, it certainly had a touch of style about it. Even though i worked for the GRA, they treated me very well.
One of the most recent casulties was the iconic art deco Walthamstow Stadium. A massive campaign to save it from the bulldozers failed. When the money men come calling to build houses, the writing is on the wall. If either Coventry or Oxford could be saved, it would be a big boost in these worrying times for the sport.
Plenty of stadiums were viable, but their land value was far more valuable than their sporting income. Norwich and Southampton were two of the earliest casualties.