Earlier quoted context omitted.
They don't need to return to baseline. The overall market return can be around 7% - within that you'll have losers, flat lines and huge winners like Apple and Nvidia. That's how you get to the 7% average - by having some companies gain much more than that.
It's very hard for that to sustain over decades without causing market distortions. I'd be interested in what is the longest run of above-market returns by any company since the 1870s. In effect, if they accrue enough value, then they alter the average rate of return. And, since that sucks capital out of the rest of the economy, we're kind of fucked overall because companies making tinned peaches and medicine actuall…
What's constraining the latter is rates. There is zero evidence tech companies are causing the inflation that is pushing up rates. (If anything, it's broadly deflating.)
(And to my knowledge, getting financing for tinning peaches or medicines is plentiful. It's called middle market finance, and while it doesn't make the headlines, it's huge.)