John Petrucci from Dream Theater says being "uncool" became the prog outfit's greatest strength, Metal Hammer reports.
And the guitarist says the new generation of progressive rock bands is heartwarming for Dream Theater, who are relative veterans of the genre.
Ahead of the band's headline slot on the Saturn Stage at Sonisphere, Petrucci tells TeamRock Radio: "Yeah less cool is correct. At that point in the Seattle scene is when our second album came out and Nirvana and all that was all over the radio.
"For some strange reason for that time in 1992/93 Pull Me Under from that album somehow broke through and was a radio hit and it didn’t make any sense in the midst of what was going on with grunge – but it was poking through and it was interesting.
"The cool thing is, over time, those differences and the uncool factor and everything else actually became our strengths and what separated us out and make us successful in the long term."
On the state of modern prog, he adds: "I think it’s great for the progressive community and it's been a style of music playing since the beginning we naturally latched onto, just because of the influences we had when we were younger.
"It's always been this thing on the outskirts and now it's great to see younger bands and a splintering of the style and the genre. It is great to see it exploding."