I imagine getting a notification on their phone reminding them if they’ve not brushed their teeth by a set time might help forgetful people to remember to brush their teeth, and if it’s via Home Assistant, which is self-hosted, entirely local, and open-source, there’s no downside other than having to set it up in the first place.
This isn’t really the same kind of bug. Those bugs made instructions emit the wrong answer, which is obviously really bad, and they’re really rare. The bugs in the article make instructions take different amounts of time depending on what else the CPU has done recently, which isn’t something anyone would notice except that by asking the kernel to do something and measuring the time to execute affected instructions, an attacker that only had usermode access could learn secrets that should only be available to the kernel.