Maybe if your electricity is free or cheap mining is still worth, but if your electricity cost is expensive is not worth. Remember, a lot of peoples mining and it makes coins difficultly increased and the market condition is not supported now.
I'm glad I don't have to deal with this level of ignorance and short sightedness at my day job. I'd go crazy ... Lol.
I see that you're going crazy. It's good. But what is your point in this discussion?
Is it worth to buy new equipment for mining now or not?
My point is that I don't agree with your statements. I agree that no one should be over paying for gpu's. I don't agree with your statement about what you call ROI, but is actually called capital recovery. There's no point in trying to calculate it for any reason other than to give yourself a baseline. The market is so volitile that what you say will take 1 year could change to 6 months in four days. Making blanket statements like that isn't useful to anyone new in the space.