Patches existing for the firmware vulnerabilities of major manufacturers is good (I'll take your word for it, having not looked recently, but I know that a few years back this was not the case and known vulnerabilities could be found easily on shipping products).

The pathway from the patch existing to the patch being applied is overgrown with flammable brush. Infrequently traveled. Not healthy. There are efforts to fix this, but they don't have too much momentum at the moment.