8 String guitar? son of a bitch man, that's some insane stuff.
That style is pushing things forward and I don't mean to come off with the attitude of "only play 3 chord 3 minute wonders 80's style" even back in these days I prefer the more different stuff from the norm, the standouts you wouldn't see on top of the pops lol.
as much as I like difference I really don't see the point of multiple string basses though, 5 and 6 stringers... (More strings makes you more skilled, that's what some of my friends say. Nah)
First 3 Metallica albums, first 3 Helloween albums, Dio era Black Sabbath, Rush's Moving Pictures, Judas Priest's British Steel, Screaming for Vengeance, Defenders of the Faith albums, Iron Maiden's Somewhere In Time, Powerslave and Seventh Son of a Seventh Son album. That was the 80's for me as well as the NWOBHM standouts like Saxon
Then came the 90's with Gamma Ray, Blind Guardian, Iced Earth, Symphony X and Grave Digger who all last to this day evolving.
I am bitter yeah, and good reason, bands who conform their image and music to what the scene demands are taken higher in the scale of recognition than the bands who put their heart and soul into playing music for the sake of music, art.
As soon as you start playing for the sake of the needs of someone else, you've done what most people would call "selling out" and what that means, to me, is selling your soul musically.
I like how some of the bands from the New Wave of British Heavy Metal era such as Iron Maiden, Judas Priest and Saxon have evolved the sound that they helped create, they've changed their sound to experiment and Maiden and Priest more so, have changed to compensate for the increasing age of their frontmen too resulting in a thicker, heavier and more modern sound while probably not intentional it serves as a fitting example that in this modern world the ideals, the heart and soul of the prime time of metal can be transposed into today.
A darker, progressive, more atmospheric style that maybe a bit more technical and advanced than their old stuff but its still fantastic.
Some power metal bands such as Blind Guardian and Symphony X have picked up on this and evolved their own sounds while others like Gamma Ray just keep changing anyways as they keep experimenting and playing around, enjoying.
The best bands have a mix. A mix between progression, variation, dedication, Intelligence, Skill, Speed and respect of all instruments in their band allowing even the drums, bass and keys to take a more avant garde approach.