(I haven't used the above personally, but the Golang parser does.)
Personally I have used PEG parsers and I was able to provide great error messages, by using the "cut" operator in the appropriate places in the grammar (see comments earlier in the thread I linked above).
Please don't be uncharitably dismissive. The author didn't throw away the parser because it was recursive descent—in fact he explicitly excludes that as a reason.
(The rest of your comment is fine.)
To me his justification sounded pretty convincing, though not to you, which is totally fair. As far as HN commenting goes it's just a matter of explaining your view in a substantive way.