Jackfruit. For a while it was the 'go to' vegan option for places to offer; jackfruit smothered in awfully sweet BBQ sauce. The texture is softer than anything it's trying to mimic, It's messy, and flavourless.
Honestly, I in general don't really like when a meat is substituted for a food that is not a primarily protein source. Like replacing meat for cauliflower or jackfruit, as opposed to something with legumes or lentils
It creates really imbalanced meals that don't meet our dietary needs, and turns active people away from a plant-based diet. Vegetarian and vegan diets already have a reputation for being protein challenged, and this type of substitution hurts it further by substantiating those assumptions.
From a health perspective, eating more protein is really good for satiety and therefore weight loss. Personally, when I don't go out of my way to incorporate extra protein sources, I usually just don't feel satisfied and full. I understand and recognize that you literally don't need a ton of extra protein to be healthy, but I feel best when I have it.