> I would argue that AMD is not the reason they are more power efficient, it's TSMC.

Why ?

Because the areas where Intel stumbled wasn’t design, it was their manufacturing being behind, something tsmc does for AMD.

But it was also design where Intel failed to innovate for many years.

For example, the chiplet approach that AMD embraced allowed AMD to put together far more powerful CPUs, i.e. with more cores and at a competitive price, than Intel could.