Margarine without trans fats is readily available and can be a healthier fat than butter though. But I agree the initial, high trans-fat margarines were bad.
Red meat is not very hard to beat in terms of negative health outcomes, so I doubt plant-based meats will be as horrid as the initial margarine put to market.
> Margarine without trans fats is readily available and can be a healthier fat than butter though
No.
> high trans-fat margarines were bad
There's no such thing as "high trans-fats". Industrial trans fats, like from margarine or other ultra-processed products, is unsafe in any quantity, low or high. There is indeed a principle of toxicology that "the dose makes the poison", however in case of trans fats that dose is really, really low.
> Red meat is not very hard to beat in terms of negative health outcomes
There is in fact no tangible proof that red meat has negative health outcomes. All you have are surrogate markers and some poor and old observational studies that can't be reproduced in randomized controlled trails.
