Inside the Intel 1405: die photos of a shift register memory from 1970 (opens in new tab)

She didn't do anything remotely this complicated, but a few years ago Jeri Ellsworth did do a couple videos of "homemade" ICs.

https://www.youtube.com/watch?v=PdcKwOo7dmM

Uhm no, absolutely not. The basic operational principle remained the same, but absolutely everything has been changed many times over. Trillions of dollars were invested to make it happen.

The only constant is probably that it is still made on a silicon wafer. But even this wafer changed a lot, and I am not talking about its size.

Would you also compare a horse carriage to a Tesla?

Getting a modern die photo requires using an electron microscope or a scanning-probe microscope, because feature sizes are down to about a tenth the wavelength of visible light. That alone makes the photos look pretty different.

Modern chips also have quite a few more layers (process steps); e.g. IBM's old 0.13μm process supports 8 metal layers, not counting other steps like epitaxial growth and oxides: https://www.mosis.com/vendors/view/ibm/8rf-dm

Not sure what you mean by not changing much. Those are probably NMOS circuits. We use CMOS today.