When in fact, the tweet is absolutely not about either of the two. He's talking about a thought experiment where hardware stopped advancing and concludes with "Innovative new products would get much rarer without super cheap and scalable compute, of course".
Interesting conclusion—I'd argue we haven't seen much innovation since the smartphone (18 years ago now), and it's entirely because capital is relying on the advances of hardware to sell what is to consumers essentially the same product that they already have.
Of course, I can't read anything past the first tweet.
In the meantime, hardware has had to go wide on threads as single core performance has not improved. You could argue that's been a software gain and a hardware failure.
Single core performance has improved, but at a much slower rate than I experienced as a kid.
Over the last 10 years, we are something like 120% improvement in single core performance.
And, not for nothing, efficiency has become much more important. More CPU performance hasn't been a major driving factor vs having a laptop that runs for 12 hours. It's simply easier to add a bunch of cores and turn them all off (or slow them down) to gain power efficiency.
Not to say the performance story would be vastly different with more focus on performance over efficiency. But I'd say it does have an effect on design choices.