This is valid. I think the idea is to recognize what trends make for a lasting product and make your best educated guess. For instance, my Ford ranger has a cast iron block and cast iron head. The valves aren't interfering, so if I break a timing belt my engine won't grenade. It is easily serviceable by myself and of the shelf parts are still available. My truck shares a lot in common with trucks of the 80's meaning there has been over 30 years of continuous support for it.

As far as vehicles go, I'd say it qualifies as bifl for now. I would post my truck, make my case and let y'all decide for yourself if it qualifies to you.

That's sort of my 2cents though.