The problem with 2x more video cards is management, twice more risers, twice more problems, twice more psu cables. The 3080 is easily the best buy, now yeah prices vary depending on the country but I believe once this turmoil is over, things will get back to normal and the price of the 3080 will be very close to msrp which in turn will make it attractive again.
There's no doubt, less cards = easier to deal with
And Nvidia ones are easy do tweak and maintain than AMDs, but at least in my case, I'm only mining in a small rig, with the USD price, is worthing again in my country
In another countries, we have to wait a lot of time to have a good price on these cards, but even with the suggested price here, it's only 12 months to "roi" RTX 3080, a good deal in my opinion