Been hearing that for half my adult life. People were 100% sure multicore in 2005 meant manufacturers were officially signalling it and it was time to invest in auto-parallelizable code.
I don't think it's wrong, but looking at it through a child's eyes, we do keep finding ways to do things we couldn't a couple years ago: an open mind on hardware and more focus on software is continuing deep innovation cycles
Leaving aside that we're still far from hitting the limits to growth outlined in that book, and that we can exceed those limits to growth by expanding outside of Earth, what does a book about physical limitations on agriculture and industry have to do with limitations on computing efficiency? There is of course some fundamental limit to computing efficiency, but for all we know we could be many orders of magnitude away from hitting it.
We've clearly fallen behind the exponential curve on clock speed. But the great thing is we can parallelize transformers, so it's not as big of a deal.
I don't think it's wrong, but looking at it through a child's eyes, we do keep finding ways to do things we couldn't a couple years ago: an open mind on hardware and more focus on software is continuing deep innovation cycles