since their firmware is built on top of WRT but they're a huge manufacturer, I'd expect most of the vulns would also apply to WRT generally even if Asus is the flavor where the vulns happen to get discovered.

FWIW Asus is Taiwanese, so they have a unique national security incentive to sell clean routers; too small a country to have offensive national security like the NSA/China, yet a big target where defense against both of those is important.