Not really. Black metal has been germinating with other forms of metal for a long time. Blackened thrash like Aura Noir, and hardcore black metal like the bands from the Pacific Northwest. That’s just how metal evolves.
Yes, of course long-standing Jackal patrons will no doubt recall the oft use of his spoken name during Sundown at Jackal Ridge; the original wax recordings of Jacob and Thomas Fortin spoken-word essays on bare-knuckle boxing. Two years into it’s run an estate came betwixt the brothers and after leaving the family ministry Sir Jacob paid a young Sir Harkness a shilling per episode to read talking points to him.