i recently stumbled upon his "tetragrammaton" podcast on youtube, listening to the episode with soad's daron malakian, which was actually very interesting.
then i had a look at what other interviews were on offer. among popular actors and musicians there are such luminaries as: palmer luckey, peter thiel, mark mcafee (apparrently some raw milk tycoon), jay bhattacharya (covid-19 hoaxer type guy i guess), mr eggman himself, etc etc
on the podcast rubin comes off as this cool, open-minded hippie person, "just asking questions" and "having a conversation" with interesting people. so i guess he's just sort of following the rogan formula. except i think rubin has a bit more brain matter left than the mma/dmt guy. so i can't help but wonder if this podcast is a bit more of a targeted effort at influencing new age people just coming across it like i did.
i was actually quite surprised at this, so i also did a bit of searching, and apart from the post you linked i also came across nothing else. but his work speaks for itself i guess.
any of these except the last one wouldn't be an implausible guest of this podcast, honestly. (i was talking about andreessen)