Bro. Most interview panels are more than 3 hours. If you're getting a multihour test, it's literally the only interview in the day.
If you want me to do work for you and judge me on that, I'm available as a contractor.
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?
At some point, you have to wonder when know you’re the odd one out, but you didn’t. That’s on you.
Do better next time Tiny.