I worry about this. It's easy to let things slide in terms of data quality and statistical rigor when building machine learning models, even in the best of time

I worry about this. It's easy to let things slide in terms of data quality and statistical rigor when building machine learning models, even in the best of times. When it's a problem people would actively rather not have to think about (which of these patients should get a ventilator, for example), that's even more true. Add to this the fact that Epic isn't exactly known for the quality of their engineering.