Next they'll come for our OpenWRT-flashable equipment. I've already done everything the article says to do years ago, but what happens when this equipment dies

Next they'll come for our OpenWRT-flashable equipment. I've already done everything the article says to do years ago, but what happens when this equipment dies? Can I get a replacement, and is it flashable? I currently use "routers" as access points because it's the cheapest way to get an AP for OpenWRT.