Interesting blog posts (it and the preceding one). It seems that reliably emulating the x86 architecture is made even harder by a few features not found in other popular architectures, like an extra level of indirection on memory access (segment registers and the corresponding segment overrides) and most instructions having a memory-accessing variant (instead of limiting memory access to separate "load" and "store" instructions, plus a few specialized atomic RMW instructions).
Interesting post, thanks. By the way your site seems very slow to load in Australia - it might benefit from use of a CDN if you don't already use one. (I usually recommend Cloudflare to people, their free service is great)