IIRC there are experiments where a tomato top is grafted onto a potato bottom. So in theory you can have the tomato fruits and harvest potatoes when the plant is done. Tricky part is grafting it and (I assume) keeping a close eye on it since its seperate species.
They're distant cousins so it works. IDK how far tobacco is, but I assume its a bit further and thus harder.
Fun fact, all three have some level of nicotine in them. Just the potatoes/tomatoes have such a low level you'd die of one of the other alkoloids before you could get a noticable nicotine dose.
They're so desperate I saw airforce recruiter pamplets in a tropical smoothie. I guess its the only branch appropriate for someone who likes "healthy" food and/or cold smoothies. (Funny since I briefly thought about the chairforce before realizing I didn't want to die for oil.)