Note that your docs specifically mentions parquet was supported, but we found out the hard way some specific features turned out not to be supported with WASM + parquet. I did a quick glance at your docs and could not find references to that, so I'm not surprised it was missed.

It was a project that exploited a new opportunity so time-to-market was the most important thing, I'm not suprised these things were missed, and replacing the data loading mechanism was maybe 1 week of work for 1 person, so it wasn't that impactful a change later.