So far as I can tell OP you’re basically complaining that once you upgrade a part you’re left with the original knocking about, you don’t want to just throw it in the bin, but you’re too busy to stick it up on ebay/classifieds, give it away to clear some space or even refurb it for reuse as an emergency spare…
My response would have to be; Suck it up, either bin it, flog it, store it or Refurb it, you don't have any other options…
But stop whinging because your too rich to concern yourself with fixing stuff, yet too tight/environmentally aware to simply bin something you no longer want, it sort of makes you seem like a bit of a prick (I know, Pot-kettle-black)…