I've tried tons of diets over the years and keto is by far the only one I've had success with maintaining long term. Even when I take a cheat day, carbs just don't taste that good any more so I end up feeling bloated and go right back on keto.
I've noticed this too, not even with full keto even. When I eat healthier things regularly (veggies and chicken instead of burgers and fries, etc), sweet or carby things taste good but they don't compel me, UNLESS I lapse for a few days. Then the carb cravings come back and I have to work and fight them for days or weeks to reset back to healthy mode.