Earlier quoted context omitted.
Demos of this caliber are like F1 cars from 60 years ago: a single genius, or small team, creating something totally beyond the reasonable expectations of everyone who is familiar with the technology in question. I really hope it continues to be possible for this art form to exist.
The most impressive one for me will always be fr-08, the .product, released in 2000: https://www.youtube.com/watch?v=1dcrV_7JpXQ Pouet link if you want the binary: https://www.pouet.net/prod.php?which=1221 It blew my mind when I first came across it in 2003, and it's still highly impressive even now.
That path brought me to HPC, efficient and high performance programming and showed me how thinking about writing efficient code made a difference.
Yes, you can't arrive to demoscene level wizardy in every application/tool you write, but optimizing the obvious and then some changes things a lot.
Thinking about it again, possibly coming from C64 and early x86 hardware already primed me to "do more with less" mindset already, but '.the .product' get the things rolling.