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I wouldn't bother.. Not from a 3080 and not so close to whatever arrives later this year/beginning of next year. The only way I would consider it would be getting a decent penny for the 3080 and then exploit the lesser mindshare of the Radeon brand and buy the XT second hand for cheaps.
I want to replace my 1080 as its been playing up recently, but this is my conundrum now. Do I get a 7900Xt so I can enjoy all the upgrades I did to (mem, mobo, cpu) or do I wait until end of the year/next year for the new cards although I guess those are going to launch at premium above/at where the current cards are if they have better performance I would have thought?