@eric: Oh wow, the response you linked is very similar to my question. Not sure how I missed that.
So basically, GL-iNet is saying that if a security issue is important enough, that they’ll patch it themselves. But you are saying that there are some vulnerabilities that Gl-iNet thinks are not important enough to patch, like the dnsmasq stuff.
It seems so very difficult to find a maker of retail-grade routers that will continue to provide timely security updates to their devices for the whole life of the device. Does such a company even exist? Anyway looks like I should definitely prefer whichever devices are well-supported by OpenWRT, since that seems to only way to get real security patches. And that I should abandon the idea of the native Gl-iNet firmwares.