> I have experience with a project that was based on that book, and there were (and probably, are) a lot of bugs in the parsing code, that wouldn't have been there if a parser generator was used.

I think I need to a add a big "do. not. use. in. production!" disclaimer then :) The parser we build in the book is, of course, not a battle-tested, industrial-grade parser that can survive every fuzzer you throw at it. Far from it, but that's fine, since that was never the goal. The goal was always to learn.

So, yes, I agree. If you do need a production-ready, stable parser: use a mature parser generator or, maybe, invest more time in getting good at writing parsers than it takes to read and work through the ~100 pages I wrote on the subject.