OK let me clarify. When I first heard this stuff it sounded mind blowingly heavy powerful, noisy and hard edged. Over the years as music has pushed those boundaries ever farther the context has changed. It now sounds comparatively polite, melodic and, yes, quaint. It has lost that crazy edge with the passing of time.
This does not insult, devalue or belittle the music in any way. It has ever been thus. Cutting edge becomes mainstream, wild becomes tame.
My dad told me how his father dismissed the music he (my dad) loved as "just a noise" and "not even music". It was Bing Crosby.