...
Yeah, you are right, but the current 220+ days for ROI is a really long time. Of course if the bitcoins skyrocket to 5000$ then that would be a very different story !

Only in the crypto coin world would 'ROI' (and apparently defined here as purchase-price being recovered) in 220 days be called 'a long time'. Capital equipment purchased for any other business is usually looking at well over 1 year and more until break-even is reached... Why do you think we are allowed to write off cost of equipment/depreciation?
Plus, if in the USA there is this
Section 179 IRS deductionYou are also totally right ! 220 days is fine for ROI, problem with ASIC is the devaluation that is really fast. And when I say 220 days, it is at current dificulty. So, it's a bit difficult to predict the real ROI. I prefer video card mining since when they don't produce anymore revenue by mining, they are still valuable and could be reused for gaming. ASIC become a waste really fast compare to video cards.