They became too commercial for me, the privately run ones were good but as soon as the bookies started doing them there was a different agenda created and none of it for our benefit.
Go back 20 years before social media dominated everyone's lives and you'd go to these evening and learn plenty, there would be nuggets everywhere, in todays world of never ending reporting, be that from professional platforms or those in it for the clicks, there are endless updates even when there's nothing new to say so I think the preview circuit loses its' value as an education and becomes a night out on the piss...