I look back at the punk 'explosion' with some amusement. I bought into it in a big way at the time. But, in reality, it was a period of around three years in the UK ('76-'79). During that period bands like The Eagles, Fleetwood Mac, Queen, Pink Floyd, and The Stones had huge hit albums. So you have to ask the question 'Was anything actually changing?' I would accept that Metal changed. The fast and furious tempo was picked up. But the 'Old Guard' if you like, proved they were more than equal to the task in front of them.