Without looking, I guessed that all your quotes come from academic papers. I was right.

Because real life is nothing like what is taught in CS classes.

I'm not an academic and have extensive experience with parsing.

But for whataver reason, VPAs have slipped under my radar until very recently - I only discovered them a few weeks ago and have been quite fascinated. Have been reading a lot (the citations I've given are some of my recent reading), and am currently working on a visibly pushdown parser generator. I'm more interested in the practical use than the acamedic side, but there's little resources besides academic papers for me to go off.

Thought it might be interesting to share in case others like me have missed out on VPAs.