Technology

That really stopped being true in the Skylake era

Absolutely, the 14nm process was leading when it was new, but the delays and ultimate failure of 10nm caused Intel to fall way behind. But before that from the very beginning of integrated circuits, Intel was the leader in manufacturing. From the late 70's Intel when Intel made the i8086 they achieved an economic advantage, that enabled them to stay ahead pretty much consistently in manufacturing.
In 2016 TSMC achieved parity with their 10nm equivalent to Intel 14nm with maybe a slight advantage over Intel, and after that it's well known that TSMC continued quickly improving past the points where Intel had failed, and TSMC became the leader.

I should have written always prior to 2016. Because it's 8 years ago now, but before that, Intel had stayed on top for half a century. Despite for instance M68000 and Alpha were way better processor designs than anything Intel had.

there’s no case where I’d want to buy Intel over AMD if they cost the same and perform similarly,

I agree, the only reason I quote this, is because of the insane change in how Intel vs AMD is viewed compared to before Ryzen! Compared to AMD FX series, the Intel Core and Core2 were so superior, it was hard to see how AMD could come back from that. But when Ryzen was presented late 2016 it was clear to me they had something new and exciting. And they really elevated desktop performance after years of minor iterations from Intel.