I think you've missed the point.
It's not about the choice of medium or keeping up to date or what is more convenient.
It is about finding, owning and (if you are lucky) playing to others the original product.
Your argument is the same as the one Bill Gates used to suggest that if you could digitise all art and then have the digital images on your wall to look at, people would then stop going to art galleries to see the originals.
Please can someone close this thread now? cos it is boring.
People who want original vinyl and travel to hear records on original vinyl will never agree with people that can't understand why its not OK to play bootlegs, CD's or mp3's at these events.
People who play CDs etc at events are not wrong in any way they are just different events for different people.
That's it.
Apart from tracks that are CD only.
......
.... Bugger.