Oh that's too bad. I'm intensely curious about the experience and it's very poorly covered in most places. Guess I'll just have to try it for myself :)
Writing a self-hosted compiler feels a bit like climbing a skyscraper without a safety belt. I usually test each change by immediately having the compiler recompile itself a few times. Back when it was unstable, each time felt like a plunge from a mountaintop, with a jolt of adrenaline. I guess it still does. :D