I didn't encounter take off briefings until my IFR training. Initially I found them very silly. Mostly because the instructors at The Professional Flying School were more concerned about the regurgitation of the briefing than actually conveying the information.
Lately I have learned to appreciate the general idea more, even when flying single pilot. But more on a higher level, as in 'i woud turn left/right and land there ' not 'and apply brakes and shut down the engine'.
For multi crew ops i find them very valuable if they are short. IMO they shouldn't contain any standard info, only what deviates from the standard.