I donated two of them to my parents who used them until one died a few months ago. They live in the boonies so, they only get 10mbps internet but wanted good coverage for a decently sized house + garage, so I set one up as repeater.

But I wouldn't use it myself anymore, unlike my parents I don't have mid 2000's internet speeds, and I stream games, movies and take backups over wifi.

Network speeds got faster and the software stack became more CPU-hungry (e.g. running CAKE), which means old hardware can't keep up with many use-cases.

Seconded. I actually used it a few months ago to stage 20 old laptops for covid induced homescooling. The 10 laptops staging before that managed to cook my more modern router, and I had promised to deliver the next day. The WRT didn't budge and was actually speedy enough.

I donated mine to my father. He still uses it for his somewhat basic wifi needs (he has wired ethernet for his "real" desktop computer).