Same in the occasional scenario where you have limited options- i'd like to still be able to just eat something with carbs in and take the insulin to cover it. Not talking every day here again, just that when something is completely off limits it is a step too far for me i think. Having a week of ill feeling from getting used to low carb again following those occasions would be i guess part of why people consider its not really an option.
@edan - I don't think it's true that you'd have a week of carb flu after every "treat", but it would be good to understand the impact of cake or other carby food on your blood sugar, and how long it takes to come down. That would give you an indication of whether eating that food is worth it in terms of your diabetes management. I'm in the early stages after diagnosis and have chosen not to eat even relatively low carb fruits such as berries. However once my HbA1c is within acceptable levels, I will experiment with a few things - like berries- to see whether they can be reintroduced.