What makes Progressions of Power by Triumph notable?

'Progressions of Power' reached No. 23 on the Billboard 200 chart, marking a peak in the band's commercial success. The album is notable for its incorporation of progressive rock elements into hard rock, influencing subsequent artists in both genres. Released on March 25, 1980, 'Progressions of Power' was Triumph's fourth studio album, following their successful 'Just a Game'. At this point in their career, the band was cementing their reputation in the hard rock scene, having gained significant attention with previous albums and a growing fanbase.