Thank you Forrest.
While I myself have never done a thermal paste renewal, it seems that all the old-gear Macintosh experts renew the paste on their computers after a bit over a handful of years. It stands to reason that the same process should be done in any other systems that also employ thermal paste from the factory.
Heat is the enemy of electronics, dramatically shortening lives that could be into the decades. The A6 evidently self-protects against overheating. One wonders if there are other, possibly older B&O systems that simply hara-kiri themselves in a heat daze.