I'm the author and i did write some parsers. However i'm more in the write-parser-by-hand camp and context-free is not so hard here. ANTLR needs strange hacks to parse Python with its whitespace indentation. A handwritten parser just needs some context within the lexer.
In my eyes a parser generator is the solution, if you want to trade efficiency for cross-language-portability. ANTLR is probably the best solution at this point, though the C backend is quite wierd.
I like to get shit working first, and then downcode if the PG does a horrible job. Nothing better than a hand-written anything, but I like the options of tools. Stange hacks for python supports your original argument I believe.
In my eyes a parser generator is the solution, if you want to trade efficiency for cross-language-portability. ANTLR is probably the best solution at this point, though the C backend is quite wierd.