@byterhymer @fsf @fsfe
For me personally (see the blog post) that would be: cleaning-up the FSB---we cut quite some corners---, getting rid of the ancient gcc-2.95.3 dependency (directly build gcc-4.6.4), getting Gash/Gash-Utils to run on top of Mes, and and RISC-V support, hopefully followed by ARM/AArch64.
But yeah, I really hope that others will address the hardware and kernel bits of the bootstrap!