My admittedly ambiguous threshold is "significant impact to quality of life" Battery fires can kill so even a handful is significant, but a security vulnerabil

My admittedly ambiguous threshold is "significant impact to quality of life" Battery fires can kill so even a handful is significant, but a security vulnerability that impacts thousands of routers has lower but wider impact. Some companies will be targeted for DDoS or using the routers to probe and infect the company infrastructure... some consumers will end up paying ransomware, or having their finances hacked, or personal info leakes, or bandwidth siphoned.