Read anything about rock music in the Seventies - about British hard rock music in particular - and three bands are pushed forward as titans: Black Sabbath, Led Zeppelin and Deep Purple. However, while both Black Sabbath and Led Zeppelin have gone on to receive widespread critical acclaim and massive sales since their glory days, Deep Purple have assumed the position of a guilty pleasure – at best. How is it that the band who produced songs such as “Black Night”, “Highway Star” and “Smoke on the Water” have not been subject to a whole Friday night’s coverage on BBC Four?

In their new, semi-fantastical concert movie Metallica: Through the Never, the gas-masked marauder who hunts the band’s fictional roadie, Trip, through a nightmare landscape, pictured below, is less cinematically memorable than Metallica themselves. Director Nimrod Antal gets his cameras up amongst them on-stage, as their muscles and eyes bulge and mouths gape, revving up the fans with how much they get off on this music, too.

There is no guarantee of success in any area of rock and pop but those who wish to succeed through sheer graft might look to metal as their main chance. While multiple bands in other genres have fleeting, unpredictable moments in the sun, a decent metal act ticking the right boxes with the fans and initially willing to slog the circuit for 350 nights of every year, especially in the endless wilds of Middle America, can build and build and build. Look at Iron Maiden, possibly the biggest band of their vintage in the world.

I write as a listener and concerned citizen. It's 2013, the legends of dad rock are facing the death squad: no liquids, no solids, no chance, baby. There's something dead in the water and a new breed is feeding on the remains. Welcome to Deathcore, Screamo, Metalcore, whatever.

The original Black Sabbath were a feat of engineering on a par with a classic Land Rover or an AK47. Everything about them was basic, brutal, unadorned and brilliantly functional – and as such achieved a very real, if rather grim, kind of beauty. So it's very nice indeed to see Tony Iommi's churning detuned guitar, Ozzy Osbourne's desolate howl (one of the most inhuman voices in popular music this side of Kraftwerk, in fact) and Geezer Butler's basslines and lyrics of alienation reunited, 35 years after they last recorded together.

Continuing its voyage through Scandinavia’s music, theartsdesk opens the latest chapter in Norway with Still Life With Eggplant, the 16th album from Trondheim’s prolific, long-lived, occasionally challenging and always vital Motorpsycho.

Blue Öyster Cult: The Columbia Albums Collection

Back in the early Eighties, Saxon made the heavy metal equivalent of home-cooked roast beef and Yorkshire pud. Axe-grinding albums like Denim and Leather and a work-ethic straight from the Barnsley pits made Biff Byford and the lads a loveable bunch. Their meat-and-potatoes approach, however, meant they have always struggled to compete commercially with the likes of Iron Maiden and Def Leppard. The band never seemed to care. Sacrifice sees them complete their 20th album in 34 years. Just.

Santa has returned home, but he wasn’t the season’s only visitor from the Nordic lands. The crop of recent music in from the region embraces genre-crossing jazz, vintage-style rock, the expected electropop, cross-border collaborations and a seven-year-old Finn. Exploring all corners of Scandinavia’s music, theartsdesk journeys where no one else does, landing in Norway first for some finely formed jazz.