When we are talking about ROI - ASICs vs GPUs, it's usually the case that ASICs will ROI faster than GPUs, which is great.
But the thing that is almost even more important is, how much time do you profit from mining after you ROI!?
This is the problem you never hear anyone talking about. After you spend all those big bucks on those ASICs and you reach ROI, how much profit do you get after, and for how long!? Not very long, right?
As far as i understand, the "post-profit" you are referring to is almost always directly correlated to ROI. Just did some tissue math but if the logic is that if you get ROI faster, then you also have more capital and opportunity to invest more profitable or more efficient hardware.
Feel free to correct me with real numbers and data.
I understand what you're saying. Basically the same thing goes for GPUs. The only difference is that usually ASIC profitability falls fast after the ROI window has past. So if you get your ASICs early on during the first shipment, then ROI, profit a bit, then sell them, that could work.
This is not needed for GPUs though. So you could safely reinvest your profit into more GPUs and profit more in the future without the fear that your profit will fall to just a few cents a day.