Are pre-workout supplements a waste of money?

I think they are, there's nothing like a high carb meal to get you ready train, in my opinion real food will always beat supplements. Even back in the 70's, 80's, and 90's they wouldn't use pre-workout they would just eat a good meal before training, and that's what I do to I get great results.
Are pre-workout supplements a waste of money?
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