For me it still relevant. I understand that your a newbie and wanted to learn about bitcoin and lots of things about it.

Going back to my side, its important cause miners are the one processing the transaction send to the blockchain and they are the solve it cryptographically. Imagine if the miners has beem decreased more, and left. Transaction will become more slower and people will complained with it. No need to send your email here and asked for private discussion you can do your own research. Google is your friend and if not enough, Youtube can extent hand.