I don't know how to make sense of this level of investment. I feel that I lack the proper conceptual framework to make sense of the purchasing power of half a trillion USD in this context.
Maybe your calibration isn't poor. Maybe they really are all wrong but there's a tendency here to these these people behind the scenes are all charlatans, fueling hype without equal substance hoping to make a quick buck before it all comes crashing down, but i don't think that's true at all. I think these people really genuinely believe they're going to get there. And if you genuinely think that, them this kind of investment isn't so crazy.
All? Quite a few of the best minds in the field, like Yann LeCun for example, have been adamant that 1) autoregressive LLMs are NOT the path to AGI and 2) that AGI is very likely NOT just a couple of years away.
Whatever LeCun says and really even he has said "AGI is possible in 5 to 10 years" as recently as 2 months ago (so if that's the 'skeptic' opinion, you can only imagine what a lot of people are thinking), Meta has and is pouring a whole lot of money into LLM development. "Put your money where your mouth is" as they say. People can say all sorts of things but what they choose to focus their money on tells a whole lot.