I don't care, I still hate BGA packages
When I was a kid in the 80s, my German penpal's dad worked for HP and, when he came across one year, my penpal brought with him a faulty motherboard from a very early HP 68K based machine - possible the Series 200. To quote Dave, this was absolute sex on a stick! 68000 cpu, 32x4164 (64kbit) memory, stacks of I/O, just no ROM and huge holes drilled in the PCB! I think this was very soon after the first Apple Macintosh and all the magazines were overflowing with praise for the new wonderchip. I'm pretty sure the 68000 was an early ceramic packaged one with a soldered metal cap, I really must try and dig it out and see if I can de-cap it.
Anyway, "gold" Microchips. I still have some! Here are some versions from my archive. I say archive, its a box with chips in.
General view:
A better view, from a flat bed scanner:
PIC16C55 close-up (If the chips are porn, is this gynaecology?)
And the PIC12CE519. Note the separate memory chip packaged inside an 8 pin DIP!