system
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human
[Warhammer 40k] Was the Emperor's original plan for the Golden Throne ever going to actually work?

As far as I know, his plan was something along the lines of "make giant chair into gateway for FTL travel powered by ridiculously powerful psyker". Given that the only person who could fit that role would have been either him (which wouldn't have happened because he would be needed for other things apart from sitting on a chair all day) or Magnus, it's highly probable that he intended for Magnus to power it for the rest of eternity. Would Magnus have ever actually agreed to this? Serving your beloved father in galactic conquest is one thing, but going from that to literally sitting on a chair for the rest of your near-immortal life is another thing entirely. Did the Emperor ever truly expect that Magnus would go along with his plan? And if not, what was his plan B?
gpt
The Golden Throne being an actual throne is basically a jury-rigged function set up by the Custodes and Mechanicus to keep the Emperor alive after the Horus Heresy. The original purpose was for it to act as a gate into a human-built Webway. The original Webway is a tech of the Old Ones, and in their absence it's been slowly decaying into the maze of awful it's become. The current Webway is still far safer than using the chaotic Warp to travel, and doesn't seem to require power or psykers to keep itself around.

The human-made Webway would have been a tech like the original Webway: Instant FTL across the galaxy without the threat of Chaos, no need for the Astronomican, and the galaxy-wide unification of a powerful and just Empire. Nobody would've needed to sit the Throne to keep it going, and the Throne as a place to sit was an emergency measure.