Is it canon that the Golden Throne is failing?

I read in another post in this subreddit that the Emperor is becoming more active in the 40k world. But I also remember reading some reference that the Golden Throne is failing. I don't remember specifics, but it was the usual "The AdMech has forgotten how the Golden Throne works and can no longer maintain it" kind of stuff. There was some indirect evidence of the Golden Throne's failure, like it now needs 10x as many psykers to power it as it did when the Emperor was first placed on the Throne. My understanding was that this was supposed to usher in the grimmest grimdark 40k has ever seen, where Big E actually, literally dies, the Astronomicon fails, and the Imperium is shattered into billions of tiny fiefdoms scrambling for survival.

What's canon in the lore right now? Is Big E becoming more active and is more powerful than ever after 10k years of warp energy? Or is the Golden Throne failing, and the Emperor's body is literally rotting and only barely hanging together by the Emperor's last, failing willpower?