UX

Inline validation considered harmful

Just kidding, this article didn't really use that word. And rather than an alarmist view, this is a fairly measured take. However, most of the arguments are actually against realtime (onblur)

Ignore (some) user feedback

Good points here. I think we're actually pretty good at this. We tally Zendesk feedback and periodically meet with customer service to see what's actually a problem and what