Or the other side of the coin, you can adjust to the diet and start to eat too much fat, to the point you stop losing weight.
I've had excellent results from keto and excellent results from a standard diet . All that matters is to get enough protein, be in a caloric deficit, and keep the weight on the bar (drop volume, not intensity).
True once fat adapted you can lower it a bit.
I don't even think I could mentally do keto anymore. Carb cycling is giving me better results plus I get 2 300g days, 1 200g days, 2 100g days, 1 50g and 1 0g. That chart I posted earlier is from the day I started it.