we should get into the root of the music before saying something.. there are lot of explanation before conclusion.. in the 80's as samsara said they made the music but the creations were limited.. they just stayed in the basic chords.. for now they have different stuffs gadgets and everything.. all the musicians they have their own talent.. they make music on their own.. during the creation of the music and hitting the scales if they resemble the po^No music from the past that doesn't  mean they copied the music..

just for now there is the incident Joe and Coldplay.. they are extremely talented musicians.. one is guitar god and the other is Grammy winner.. when i heard the news about the plagarism thing going on.. i went to the youtube and check it.. it was kinda same.. but why would coldplay risk all the music career and Grammy's by taking the work of Guitar God.. and there is the teacher explaining the reasons for the their music why it sounded pretty same.. I liked it and concluded that they were both amazing musicians..