"Unless you have special insight, you should assume all stocks are equally good buys."

Lol maddest thing I've read all day

"priced in"

I smell your efficient market hypothesis argument, before you even begin just keep in mind that does not apply here, it's an IPO, the price is not set by the secondary market

Even so, I'm not a fan of EMH

I think the argument is that the valuation is so high because the enormous growth IS priced in, but still being far from guaranteed. Meaning there's only downside: if the enormous growth is realized it would be a wash for your investment since it is already priced in, and in the plausible scenario it fails spectacularly or only grows moderately your investment will lose a lot of value.

In today's world, yes.

But in the past, rules & regulations basically forced companies to IPO at a certain size. This meant that when they IPO'd, there was still growth upside.

Those rules are gone now, so they can stay private and have all the growth happen privately. When they IPO now, it's more just an exit. The growth was captured by insiders only.

But those other ones at least have the room to potentially do that, even if most won't. So what GP is saying is that this is a magical stock indeed, but the other way around, in that it's magically capped.

The point OP is making is that it is not, in fact that its the opposite: its a magical valuation that almost guarantees you lose money.

Also rare for an IPO, I assume.