This also means you'll want to ensure that any floating MCU pins are _not_ configured as digital inputs, as the Schmitt trigger circuit itself will waste power switching back and forth between high and low states constantly.
Stop right there. Floating CMOS inputs are generally not a good idea, even if they can be configured to shut off the digital receiver.
Yes, in some cases, you really can shut off the power to the digital receiver, but in the general case, you're better off configuring a pullup or pulldown on the pin, to keep it out of the CMOS transition region.
However the general idea of using hysteresis for signal conditioning seems transferrable to other non physical control systems. I suspect that people who think about what the article is saying rather than reflexively declaring it to be slop could learn something useful.
https://news.ycombinator.com/user?id=jay_wevolver
Is the account that used to heavily push this domain, I'm surprised it hasn't made it to the banlist.