As for resale, it will still be possible. Shipping blades will be cheap and there is a conversion to air cooling.
Untrue. To take advantage of IC DT, you need to design your boards specifically for that purpose. You can't use them outside.
Although I don't know who you would be selling hardware to. Maybe someone who pays $0.01/kwh?
You'll always find someone to sell it to. It depends on the timing and cost. Maximizing ROI is done by selecting the best timing. With IC DT you can't do that.
You end up throw away old HW, which eats considerably into your possible profit.