My random opinion: It's best to go on Keto intermittently; say 2 month on, 2 months off, or similar variation. I would be hesitant to be on it permanently, but doing it off and on feels safer to me.

One of the nice things, for me, in terms of having been on Keto occassionally, if that it's given me the ability to go for extended periods without needing to eat. I don't crash, in terms of blood sugar, the way I used to. Even when I'm not eating super low carb.