Right now you can get 10GbE adapters for your computer for a reasonable price for used equipment ($20-$50), it really is the switches which are ridiculous. Overall though for the most part, it's only some fringe use cases where a home user might need 10GbE ethernet.
First - unless you have some insane connection to the outside world, the most you can really get right now as far as internet speeds is 1Gb anyhow. That becomes your choke point.
Next, overall, video is the most demanding when it comes to traffic, and the average bitrate requirement for 4k streaming comes in somewhere around 15Mbit. Doing the math, that means an average 1Gbit connection could support about 60 concurrent streams. Your average home WON'T be doing that. Honestly, a small apartment complex wouldn't even hit that.
Now, who knows what the future will bring, perhaps some killer app might require that kind of bandwidth, but right now it's not here for the majority of the people. That doesn't mean that we should stop developing and investing in increased bandwidth, but right now 10GbE is a bit over the top for a home network.