You have never had an all day interview? Not even onsite?
That’s weird. Seriously. That’s weird. Every job I have had in my 20+ year engineering career had a multihour interview panel. I’m talking like at least four separate hour long interviews all on the same day. Big company. Small company. It literally didn’t matter.
And you’re saying this has never happened to you? I have to ask, what has been your typical interview experience been, and how tiny are these places?