1) This is probably too much to ask of people. 2) This still leaves behind decades of software that would still need to be built in the future and would thus still need something like the "scaffolding".
But again, the fundamental idea is really just this: Treat builds and runs as pure functions. Every other advantage derives directly from that principle. If someone else can figure out how to do this as simple as possible, I'm all for it! In the meantime, I think every developer should read Eelco's thesis paper on this idea: https://edolstra.github.io/pubs/nspfssd-lisa2004-final.pdf
Of course, the OTHER way to solve this problem is just to statically-compile everything, leading to an explosion of disk-space usage. And even then, you wouldn't get guaranteed rebuilds.
