I did well for about a year plus on basically zero carb (other than the small amounts in liver and eggs), but found my output in exercising started to diminish and started getting brain fog. The inclusion of carbs helped but had to be gradually introduced.
Again, if you’re doing well then I’m not going to be the one to say to change anything, but I just don’t think the dogmatic approach of “carbs are bad” is correct either(I’m not implying you said that).
Also, have you tried making your own raw milk kefir? I feel like that was a huge help to my overall gut health.