I attempted keto dieting and very low carb. My experience of that was not good; but that is just my experience as a T1D, and that may differ from the majority of T2's who find that approach works for them.
My main dilemmas:
-Having to calculate bolus doses for protein as well as carbs and bolus appropriately for both.
-Still having to take the same amount of injections daily (two basal doses and one for each meal) regardless of my reduced carb intake.
-Bolusing for protein was complex and almost always required a split dose, which in turn meant even more injections than my usual moderate carb diet.
-My food choices were heavily limited and this didn't agree with my lifestyle. I tried to pretend that mock interpretations of carbs would suffice but they simply don't, regardless of what you might hear.
-I was often hungry because I didn't want to add the HF (high fat) suffix to my LC diet. High quantities of fat heavily disturbs my BG management, regardless of my carb consumption.
Everything in moderation isn't a phrase that was born out of thin air in my opinion
But, like everything - diet is very much down to personal preference. As well as that, how much you change your diet (as in dropping your carbs from moderate to low, or to zero) as a T1, will only do so much on the grand scheme.
I will tag
@robert72 for you, as I know he's a ketosis dieter and it works very well for him. I'm sure he can offer you some excellent insight to managing T1D effectively when following that way of life.