In /r/keto they say "first rule about keto, you don't talk about keto".
There is a certain stigma about it as it's commonly associated with extreme fad diets. Keto posts typically get quite a lot of hate on generalist communities (like HN and reddit outside of the low carb subs) or even IRL.
The second rule is "call it low carb", unless you want to describe that terrible diet made of almond flour pizzas and cookies full of sweetener.
It's sad how commercialised the word "keto" has become, lost all of its meaning, and gave free ammunition to its critics.
At least in the zero-carb/carnivore world there is no leeway for companies to package it, or housewives to bastardise it. Good luck turning steaks into zero-carb donuts.
Is it that extreme though? It seems reasonable to assume that our ancestors would have been in and out of ketosis frequently in pre-history, meaning that our physiology should well adapted to this state of being.
I have so many health benefits from ketosis that I'd simply answer who cares?
But there is plenty of quality research these days backing up ketogenic diets (Volek and Phinney work is outstanding, Chris Palmer on the benefits for mental health too, just to name a few) that associating it to fad diets is simply ignorant misinformation.
My theory is that keto pairs well with intermittent fasting because it helps curb food cravings during fasts. Sure, you can do IF without keto, but you might have a difficult time with it and might be more susceptible to cheating.
There is a certain stigma about it as it's commonly associated with extreme fad diets. Keto posts typically get quite a lot of hate on generalist communities (like HN and reddit outside of the low carb subs) or even IRL.