2020
Eight primitives and a colon compiler in 512 bytes is a nice demonstration of how much you can bootstrap from almost nothing. The examples building up from there are the best part.
Not that impressive considering this uses BIOS routines heavily and whole operating systems including basic interpreter fit in a couple of KiB
512 bytes is quite a bit less than "a couple of kilobytes"
It's much better than 512, it fits in 336 bytes iirc.