I still think half of it is BS for the companies to make money.. The Alpha 0801 for ex. is great for Alphas.. Why all the new pipes?.. They're not meaningfully less loud than all the others. I run an 053, 086, among others, and they're not any louder than anything else.. Stupid..

I've also never heard of a track being closed because of noise. In my region more tracks are opening than closing..

Most tracks close down because somebody buys the land and bye bye RC club... I.e. normal business reasons.